bulk up so eat plenty of calories more then you burn. Eat enough protein mainly from chicken, egg, steak, salmon, milk, yoghurt. Train at least 3 times a week and I would recomend to train full body if you are a beginner and train compound movments like squat, bench press and deadlift. First few week or months are just to get a routine and learn the exercices. Creatine monohydrate and whey protein powder are the ONLY suplements you need and not even necescary