Did a bit more thinking about what else you might plan to read next, so I've decided to write a little (well, not really little) guide for my recommendations. My first recommendation would at least be one other Gospel before you move on, maybe the Gospel of Mark, since that one's a bit quicker and can help give some understanding of Jesus' actions during His life, just as John is giving you a lot of what he said. Of course, I'd really recommend you read all of them in whatever order you like if you want to wholly understand Jesus' life before you get into the rest of the Bible, but if you are ready to move onto some other parts of it, you should start reading the Book of Acts while reading some Epistles on the side as you move through it, Epistles like Ephesians, Philippians, Galatians, some of John's letters, so on and so forth, all of them are great to read but you'd probably be better off if you started with the Pauline Epistles (letters written by Paul), as they can help provide context on his relations with the peoples he taught to. These letters, known as the Epistles, will introduce you to the Christian lifestyle and educate you on giving glory to God through how you live. Now, if you want to go through that whole other side in the front-end of the Bible, the Old Testament, my clear recommendation would be to start with Genesis, since that's, of course, the whole beginning of the Earth and God's rule over it after mankind fell to sin. If they're harder for you to understand, you might save books like Exodus, Deuteronomy, Leviticus, and Numbers for a little later in your studies, as those deal with more complex topics of Israelite law in their time, which, while important for knowledge of God, aren't something I'd just immediately hop into if I were a beginner. If you're in the mood for ancient teachings of the times before Christ, Psalms, Proverbs, Ecclesiastes, and the Song of Solomon will provide you with divine wisdom and poetry. Finally, if you want to learn the full story of the Israelites' civilization when they had the Old Covenant with God (Jesus' death gives us a New Covenant through our belief in Him), read the Book of Joshua through the Book of Chronicles, and, if you want to learn about the prophets who preached to them, read from the Book of Isaiah to the Book of Malachi, which is the last book in the Old Testament. There is also the last book, the apocalyptic book known as the Book of Revelation, which describes how the world will end and how God will then combine His glorious paradise of Heaven with our Earth after He defeats evil in order to create the New Earth, the salvation where we'll eternally be with our dearest God, and where things will be as they were back before we fell from sin. I don't really know when you'll want to read this, as you might not understand some of the stuff in it without some of the context of the rest of scripture, but read it when you want to, as it's certainly exciting.
