Although I was brought up in the church, I didn't read the Bible on my own until I was in college. That was also when I became more aware of other religions and various interpretations of the Bible. I hope my answer below can serve as an introduction to studying the Bible, an introduction that I wished someone gave me many years ago.
You brought up 4 elements corresponding to 4 sections in my answer:
- "General Introduction to Christianity" situates Christianity and the Bible within world religions.
- "Using translations and technical commentaries" helps one choose a Bible translation that bridges the gap between the ancient Biblical languages and a modern language as used in the 21st century.
- "Context and Bible Interpretation" are aspects of Bible Interpretation, which is the first task for constructing a theology.
- "Spiritual meaning and Theology" is one aspect of using the Bible for Christian theology.
General introduction to Christianity
For beginners not familiar with Christianity, it is best to go with a study Bible that has lots of introductory essays that do NOT presume familiarity with Christianity, such as the ESV Study Bible which includes essays like these, and more:
- God's Plan of Salvation
- History of Salvation in the Old Testament: Preparing the Way for Christ
- The Bible in Christianity
- The Bible and World Religions
- The Bible and Religious Cults
- Biblical Doctrine: An Overview
- Biblical Ethics: An Overview
- ...
There are also tons of books about Christianity for audience coming from non-western or other religions. When I find several good ones, I'll add them here.
Using translations and technical commentaries
BibleGateway.com has many non-English translations, each a multi-year project by a committee of professional translators (such as The Wycliffe Bible Translators) who also consulted:
- Biblical scholars have the command of the original languages (Hebrew, Greek, Aramaic),
- Linguistic and general translation experts,
- Native speakers of the target language.
Even for those who are comfortable with English as a second language (like myself), reading the Bible in one's primary language can bring nuances / connotations that are missing in an English translation. For example, there is a Nepali Easy-To-Read Version which I would recommend to someone whose primary language is Nepali.
It is also a good practice to consult multiple English translations by reading it side by side with your primary language. English translations range from literal (like KJV, ESV, NASB, NRSV) to dynamic (such as the NLT). Middle of the road translation includes the CSB or the NIV. I started reading the Bible in my primary language. My first English Bible was NIV, then I found NLT a lot easier to understand, and now I use CSB to be closer to the original language. See my other answer for choosing an English translation.
Reading the Bible in the original language WILL also bring nuances / connotations that are missing in a translation (since those languages are so ancient) but requires you to learn Hebrew and Greek at a seminary. The alternative is to consult technical commentaries such as WBC or ICC.
Context and Bible Interpretation
Context is not the same as Spiritual meaning (treated in the next section):
A good book that tackles all 3 contexts above is the classic How to Read the Bible for All Its Worth, first published in 1981 now in the 4th edition (2014).
There is also canonical context, which is how other books of the Bible can influence interpretation, but this usually falls under the task of Theology, which is a layer AFTER the interpretive task has been performed.
Spiritual meaning and Theology
In Christianity, the New Testament is the culmination of God's revelation. Christians read the earlier books (containing God's earlier revelation to the people of Israel written between 1,000 BC to 400 BC and collected in the Old Testament), IN LIGHT OF the historically later books of the New Testament (written in the first century AD), which becomes the Old Testament's spiritual meaning. That is why for Christians it is VERY important to read the Bible from cover to cover. This is so that we are familiar not only with subtle allusions that NT writers made (because they all are very familiar with the OT) but also to start getting the canonical context that is very important for doing theology. See my other answer for various strategies of reading the Bible cover to cover.
Once you are familiar enough with those inter-book canonical allusions, you will be ready to study Christian theology which includes a more systematic and formal study of Christian Typology, the all-encompassing study of allusions, including spiritual meaning. It can sometimes become contentious as various Christian denominations assign different typological meaning. For example, Catholics include allusion to Mary in Gen 3:15 (see the article Who Will Crush the Serpent's Head).
The key reason why other Abrahamic religions (Judaism and Islam) read the Bible differently is because in a Christian reading ALL of the Bible (including the OT) points to Jesus Christ. For example, according to Christians, the spiritual meaning of Gen 3:15 is that the one who will crush the serpent's head (and who is stricken at the heel) is Jesus Christ. For examples of different spiritual meanings according to the other Abrahamic religions, see my other answers about Moslem reading of verses that they say point to the prophet Muhammad and Jewish interpretation of Deuteronomy 13:1-4.
To study theology, use theology textbooks recommended by the church you trust. A good widely used general textbook on theology which I read a long time ago is Christian Theology: An Introduction by the British Anglican scholar Alister McGrath first published in 1991 now in its 6th edition (2016). This textbook not only tackles the issue of spiritual meaning & typology, but also includes a brief history of Christian theology as well as an overview of a dozen or so customary theological topics. In addition, textbooks on Bible background from Christian perspective are very useful as well, such as An Introduction to the Old Testament: The Canon and Christian Imagination by Walter Brueggemann and An Introduction to the New Testament by D.A. Carson and Douglas J. Moo.