"My plan: Read the Bible and make a list of my new and old beliefs that I still want to keep and those that I just found."
The problem with this plan is that you have already limited your intellectual/philosophical growth to one specific book: the bible. Which, in all honesty, is but a copendium of fables cobbled together by a tribe of goat herders wandering through the desert 2000 years ago.
If you really want to expand your mind, try reading non-religious philosophy, or at the very least, other religious texts such as eastern religious traditions. You need to expand your mind beyond the judaeo-christian worldview, or real growth will simply be impossible.