You have much much much research to do my friend.....20 years old is a little young, but Var is a good choice.
Creatine is always run through any cycle (It doesnt effect hormones ect)
Protein is a major factor, u better get alot through ur diet or supps
Also for size, u could throw in another oral if ud like, but 2 orals is pretty hard on the liver. If u were going to, id try 20mgs of d-bol, or 120mgs of 1,4ad (Legal PH, 15% conversion rate to d-bol, made by designer supps) Or u could try something else out there. M1T is a great mass gainer, but SUPERhard on te liver, id stay away, and if u did use it, try 10mgs ed. for no more than 4 weeks.
Make sure u have proper pct and defineatly liver support....