I don't think it's as bad as md makes it out to be, but I would recommend watching more videos, like
pfholden's series of videos. He does a great job of explaining things. Maybe watch
Foolish Bailey play OOTP25 from the preseason on. That would give you a better idea, step by step, of what to do.
Are you playing OOTP with the tutorials enabled? From the main start page, click settings > misc > select enabled for screen tutorials.
What exact videos did you watch to learn baseball? I wonder if we might be able to suggest better ones. I noticed that a lot of the ones that appear first from search results are about actually playing baseball, which you really don't need to know, at least not that much about. What you do need to know about, are the basics from a fan's perspective. I'd say
this is a good one. That youtuber, theOnDeckCircle, has a number of good introduction to baseball videos.
EDIT: I'd start with watching theOnDeckCircle's videos and then go back to the top of this post with pfholden's videos and then foolishbailey's.