Listen Bro,
In my opinion, you should first work out for 2 years before you start a cycle of AAS. You have said that you are not gaining anymore. I am willing to bet that you are either not getting at least 8 hours of sleep every night, and/or are simply not eating enough. To gain weight, you MUST consume more calories than your body is burning. However, if you start now you should only do a Test cycle first. Test E or Test C. For a first time cycle you should take 400-500 per week broken up over 2 injections such as Sunday and Thursday. You shouldn't mix AAS your first cycle because if you have a bad reaction to something you will have no idea which AAS you are taking that is causing the bad reactions. You should run this cycle for 10-12 weeks. You should also take some HCG during your cycle, this will cause your boys to keep functioning and producing natural test. Also, when you end your cycle, Nolvadex and Clomid worked just fine for me, but some of these other bros out there might have their own ideas of a better PCT. Do some checking around on this board. There are some great bros here that can help you. Good Luck