In truth, you don't need to know everything about baseball in order to enjoy OOTP. It's primarily a sports
management game, so unless you want to play out all of your games as the field manager, you really only need to know how to evaluate players based on their statistics. For instance, I don't need to know how to play
43-man Squamish to know that an offensive nibling who can consistently score woomiks in the first six ogres is more valuable than a shallow brooder who is only good for the occasional durmish. Knowing the basics of baseball is, of course, helpful, but as long as you know what stats are good and what stats are bad you will at least be one step ahead of the Mets front office.