nah, you’re not thick, well no more than the rest of us :-P But seriously, to really grasp the meaning of verses, chapters, books, the entire Bible — it’s like asking how many really know why e=mc2
The complexity that underlies the material universe just might be beyond the intellectual capacity of humans to grasp for some time, certainly our vocabulary is already inadequate, unless one speaks in the language of mathematical equations.
Conversely it appears there are some few simple themes running through the Bible that may look complicated because of the length of time covered compared to our rather abbreviated lifespan and the progressiveness of their development but which, like acts in a play, are connected and explain what has gone before and tell us what to look for in the future.
Cheers!