For your GH, you want to use bacteriostatic water. You'll want to add water to the vial slowly so that you don't damage the GH. Then be gentle and roll the water around in the vail as the GH dissolves. If you want to see it done, you can find videos on youtube. You'll want to inject either sub q into fat, usually in your mid section, or you can do what I do, which is inject it IM into the tricep or delt. You'll be using an insulin pin with a 1/2 needle so if you do it IM, you'll want to use a 1/2 in needle. 

For your test, you say its a "test mix"? The only test mix I know of that GP makes is their Sust 270. This is a blend of mostly shorter esters combined with longer ones. Ideally, you'd split it up into a couple of shots. To keep bloods the most stable you would inject it EOD. But 1 shot a day would work. The best place to start is with a glute shot, using a 1in or 1.5 in pin. If you don't know what you're doing with IM oil based injects, you'll want to do some more reading. Go to juicedmuscle.com to find a lot of good stuff in the "Steroid learning center". They have a step by step guide if you need it.

Don't forget to use an AI to control estrogen on cycle and an SERM like clomid for PCT, which will start 3 wks post cycle