I took it for a few months a while back, on the advice of a guy at my gym who suddenly got real big but swore he never touched steroids and that it was all due to hard training, good eating and tribulus terrestris. I noticed absolute zero difference from it. Couple months later the guy shrank back to previous size......I'm pretty sure he was lying to me and was just taking steroids.
At 20 you shouldn't be worried about t levels. Fish oil and zinc+magnesium should be all you need. Sounds like you are trying to take a shortcut with a magic pill. There is no substituting training hard and intelligent as well as eating right.
I can vouch that it raises estrogen too. One time I used it I got a lump under the right nipple. I was worried at the time but it did go away after 3 months or so. The only reason I was not more concerned was because I had used tribulus several times in the past and felt comfortable using it which made me think it wasn't that serious. Thankfully it didnt become gyno but theres no doubt it would have led to it as a lump under the nipple is a warning sign for sure.
I've been following TC's "Dick of Death" protocol, as I am actively yearning to slay chicks with my deadly rod, and the addition of "Nettle Root" seems to have upped the libido and aggression. As I understand it, it reduces SHBG. Give it a try, it's dirt cheap.