“I will make mention of Rahab and Babylon to those who know me.”
If you want to understand the mysteries of the invisible kingdom of God, you must get to know Jesus first. As he said in the scripture above, he reveals those kind of things only “to those who know me.”
You do not need to know all the mysteries of the Bible; you need only come to know Jesus. When you have done that, Jesus will add to you all the knowledge of prophecy and other hidden things that you need, when you need it.