To add to what RickieB said: Buy a book - I would recommend "The Official Red Book - A Guide Book of United States Paper Money". From there look to see what you like and can afford! Good Luck! Darryl
Ya know that's not a bad question. Paper does seem a little "overwhelming" compared to coins. I'm looking at obsolete banknotes & fractionals rather than US paper (it just looks more interesting to ME), look around find something that looks cool & start slow. That's what I'm doing.