haha im 18 too man and honestly i think u prolly have a great start! how tall r u??? i think if u really wanna get that cut look dont rely too much on that mass gainer, but instead fix ur diet with alot of lean meats like beef, chicken, turkey, and im sure ull gain ashit ton of weight off that! if you can keep ur bf% that low and gain like 10ish more pounds id say ud have a very sexy build hahaha.