I know you did some sig work over at the BB cafe, maybe you could join in here, it might help you get involved with some of the guys.
As far as football knowledge goes, Kash was right: you'll pick up on most of what you need to know in no time at all.
You might want to look in the Trade/Keeper/Waiver section, just to be familiarized with players and trading and the who's who and what's what these days.
Continue reading up on scoring, types of leagues, what you want, who you don't want, etc. etc.
You may want to follow the drafts of the Cafe leagues; the Nameless Nomads Keeper League is about to start our draft, so it might be beneficial to you to follow along, read and make some comments, we'll be more than happy to answer your questions.
Some recent posts that could aid you:
The FFC GM's Choice Cheat Sheets
Value of RBs vs. QBs and WRs
Who to Avoid in 2004
Of course, there are many more great posts going on all the time here, and always be looking in the Fantasy Football Talk section for news, updates, and all that good stuff. Welcome to the Football side, and I hope you enjoy this game as much as baseball.