Alright man, listen everyone has to start somewhere...I was in your shoes once at age 18 I was 6'1 135 lbs. Not exactly what you would call massive. Currently I am 24 still 6'1 and 205 lbs.
My advice to you would be Squat, Deadlift, Row, and Incline Bench. I am not a big fan of flat presses for pure muscular development. Stick to compound lifts with a little accessory work thrown in. Eat as clean as possible and as much as possible. Have a post-workout shake that consists of 100 g's Dextrose, 80g's of Hydrolyzed Whey and 5-10 g's of BCAA's. If it isn't bolted to the ground you need to either lift it or eat it. Good luck.