I have found the four gospels (Matthew, Mark, Luke, and John) to be the core of all the rest of OT and NT. To study OT, you can refer to Jesus' teaching because He teaches the Law. So, reading OT, keep references to what Jesus teaches about them. To study NT, you can refer to Jesus' teaching because the epistles refer to what Jesus taught and to OT too.
So, my suggestion would be that, until you receive direction from the Lord or motivation from discussions that will compel you to seek the Word thoroughly, it is safe to constantly read the four gospels one at a time or simultaneously. You can find there will always be fresh revelation reading them over and over when there is nowhere else where you feel compelled to read. And that fresh revelation each time will be in alignment with God's Word when it's from Him.
And again, as you read the four gospels in your quiet time with the Lord in prayer, utilize reference notes that will refer you to other parts of the Bible. From there, you can begin reading the entire books that you'll be referred to. (From the point of reading, you'll find your reading developing into "study" as you search, pray, and dig deeper to gain more understanding.)
My hunger and thirst for more of God's Word continuously flows from a cycle like this below:
--- Reading Jesus' teachings in Matthew, Mark, Luke, and/or John one at a time or simultaneously
--- Utilizing the reference notes from your bible or from another source like online reference in order to page to the referred passages.
--- Reading the entire chapters (and eventually books) where the references are found.
--- Searching for Bible passages (and then the entire 1+ chapters around those passages within the same book) as a result of discussions, Bible studies, sermons, or other commutations that occur that make me go dig for understanding. These are the starting points where you may find that you didn't know about from reading four gospels. Example, if somebody discusses Esther (whom I don't believe Jesus ever mentioned - at least not according to written accounts of His teachings) you can go search on Esther yourself from the discussion that was communicated.
--- As I read/study, I examine my life, our world we're living in and the times we're living in. This leads me to do the following:
------- Repent. (This is a frequent experience going through the Word)
------- Give thanks to the Lord with revelation of His love and mercy for His children as revealed in passages that you read.
------- Pray for the urgencies and the needs that you see revealed - whether for yourself, others, the world, or the church.
------- Engage in what I'm reading. Enjoy it. Ask questions about what you read - to God, to leaders, to Christian friends (who also study the Word), and again, God for understanding. Be patient for your answers. Some come immediately; some come over time.
------- Don't rush yourself through any of what you read as your "reading" develops into "study" - sometimes in a matter of moments, sometimes in a matter of hours/days with daily routine breaks in between or even long hours closed up to devote to the Word.
As you spend more and more time in God's Word, you will find that your spirit will be more in tune to receive direction from God - where He is leading you to read and how He is leading you through life. Honoring and heeding to His written Word will always help prepare you to receive His spoken Word.
Finally, my suggestion is that you *do* read Revelation and not avoid it. When you find reference to it, read it. And when you go to Revelation as your first point of reading for a day or series of study, prayerfully utilize references.
