Yes, at 19 you do not need a test booster lol. I'm 38 and would love to have test levels like I was 19 again haha.
With MassMax XT you should be able to pack on some decent weight, without worrying too much about fat gain. I would up your calories, they look a little low.. depending on your current stats.
Make sure protein intake is up since MassMax XT will help put it to good use. You should see strength increase, hunger increase, better endurance ( although most 19 yo don't need that lol), more muscle mass, etc.
Will you be logging it? If so, there are a lot of people on AM that can help keep you on track.