if you want to gain muscle, its all about eating. you need to give your body fuel to grow (protein & good carbs). dont eat bad carbs. you can look up what those are. use myfitnesspal app for iphone or android and it will automatically calculate how many calories you need to eat per day. make sure you drink protein shake every day. i'd recommend twice a day. and that's pretty much it. you'll bulk in no time.