I'm just trying to make sense of all the time-traveling business and retcons in the Star Trek universe. You're not supposed to "learn" anything from anyone not involved in creating the franchise, obviously. You don't have to be rude about it. It's just for fun.
Who is being rude? You posted, I figured I'd ask about your goal.
If you want to make sense of the time-traveling in Trek, I'd recommend Christopher Bennett's books Star Trek: Department of Temporal Investigations: Watching the Clock
and Forgotten History
. He does an excellent job of reconciling all the seemingly incompatible Trek time travel incidents and, in my opinion, makes a good story out of it all, too.