The only thing you need OP is to get your diet in and workout routine 100% dialed in. You even said yourself it is not up to par.
You only weigh 150lbs, unless you're 4' tall you do not need to use gear. You can train hard and eat big and gain plenty of size. Deca is not going to do the work for you.
Not trying to come across as a dick, but that's reality