#2 Buy design software (DreamWeaver, PhotoShop, Illustrator, Image Ready, Fireworks, Flash) for hundreds, if not thousands of dollars OR
#2a Download software online and crack 'em. I own ALL of the above S/Ws and I didn't pay a penny.
#3 Open programs and fiddle around. Before you know it, you'll have a clue. Keep practicing.
#4 Offer your services for free and build a portfolio or get an internship at a design shop. You might be getting coffee and lunch, but at least you'll be able to look over shoulders and/or do the really simple stuff.