Gotcha...most weight gainers have a lot of sugars in them...i'm not a big fan, personally, but check yours...i'd also make sure you're getting some EFAs in there as well (essential fatty acids) - i'd look at flax oil...
The reason i would recommend test only as a first cycle is to see how your body reacts to it - from there, you can understand how your body reacts to the basic steroid compound and assess your readiness to progress to other compounds etc...i'm not saying definitely do this, this is my opinion, so i'd bump for more replies...