This one is a good start.
I've been a long time football fan, and was aware of most of the players on the cheat sheets, but this is my first year in FF as well. What I did to prepare was start googling player rankings from all manner of sources, and settled on a couple sites cheat sheets (your guess is as good as mine on which ones at this point) and then I sort of guessed who would be available by my draft position in the first 2 rounds, and started building a team by getting the best available at a given position, or the player who I thought had the best chance to do well.
It ends up being about the same, on most sites, IMO. Draft cheat sheets with any depth tend to be similar.
Now that you're playing, you just need to read as much as you can, news-wise, and tip-wise. Learn who is full of crap and who has a legitimate point. Try and play matchups, etc.
Here's a thread with some good links:
http://www.fantasyfootballcafe.com/foru ... p?t=165422
Good luck, and remember to keep trying no matter what... even if you think you're out of it, you never know, and you owe it to your league not to abandon ship if you're sinking!