Election and free will, I have a very hard time understanding how God's chosen who's going to heaven and who isn't, and yet how we have a choice to believe or not, like how can there be elect people, if we all have the freewill to choose him? It's mind boggling to me.
If I get your question correctly it is about the Bible itself not what doctrines I might struggle to believe, right?
My experience with God's Word is that I was a child when I began being taught doctrines & interpretations of prophecies in the Bible and didn't usually question what I was taught. When I did have questions I believed the answer I was given. The Holy Spirit challenged me to use only the Bible to support what I believed. This revealed that many things I had been taught for almost 3 decades was not supported by God's Word.
Many times when the doctrine is checked out the issue isn't what the Bible says but that religions are twisting the scriptures to their own destruction & judgement for deceiving others.
I still am having trouble with what is confusing to me because God has always answered my questions through His Word & the Holy Spirit to my satisfaction.