If you are new to the workout game, then do the following:
1) Research about diet, find out how many calories you need to fulfill your goal (cutting, bulking, whatever), then eat said food.
2) Pick a training program that is popular and used by many, and believe in it and work hard. Don't program hop. If one program is doing well for you, stay on it until progress halts.
3) Don't waste your money on half the supplements people will suggest to you, because you aren't experienced enough to know whether they are working for you or not.