All it takes is a sincere desire to know the truth
Matthew 7:
“7 Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you: 8 For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened”
I have found this out to be true for myself.
A tbm like yourself should SURELY be able to 'ask GOD' to learn just what JS did, about the UNTRUTH of the PRESBYTERIANism of his day.
(Why are there NO Mormons that seem to want to KNOW this?)