HGH is a very tricky compound in terms of logistics. It is very expensive, takes a lot of time to start working, you need very long cycles with it, and it is extremely faked. The worst part, is that you can spend months using a fake one without even knowing it, because it is very hard to see if it is real or not. Therefore, considering your null experience in this area, I would not go with HGH.
Instead, you have a very good alternative in the face of Nutrobal MK-677, which acts basically in the same way, but is much cheaper, works much faster, does not need extremely long cycles, and is easy to find the real one. Personally, I get mine from sarms1.com, and never had an issue, and the best part of all is that I can really feel it working wonders for me.