Welcome. Best choice you'll ever make, coming here. This is the best source of information on the net I've found. Check out the diet board for diet advice. Ask around, as everyone said. Read everything you can.
Basic things to remember:
1) Stay consistent.
2) Everything works; nothing works forever.
3) Training is only a minor factor in progression (size or strength); your diet will really determine results.
4) Train for you. No one else.
5) Push yourself. Log your workouts, and beat your previous records every time. Your life depends on it.
6) Dedication. Motivation. Do whatever you have to. Get all your food down. Train when you're supposed to. Sleep 8 hours a night minimum.
Don't let anything get in your way man. Whatever your goal, we're here to help.