Skinny kid starting to work out?

bodybuilding.com is not that much of a good site, aallotof information is overrated not to mention all the crap they try to sell. I am 21 years old too, and ive been training hard since i was 18, i have pprobablygained about 25 pounds of lean muscle. If i were you i would go to scobyworkshop.com or check jason ferrugia articles on how to gain muscle mass. gaining muscle ia a very slow process, it takes alot of dedication and knowledge. by the way check the book by stuart mcrobert on beyond brawn it tis a very good book, it will teach you alot of stuff.