Help me start peptides

I’m 27, skinny, I weigh roughly 135lb 5”11. Lots of fat in neck area and skinny fat look. I want to looksmax and gain tons of muscle mass. My hair is also thinning pretty bad and I would love to improve that as well. Are hgh or test worthwhile? Or better to stick to peptides only?

I intend to train very hard through this experience.

Besides this what diet would also be super helpful to aid everything.