GHK-Cu for skin and hair

I’ve been considering ordering and injecting GHK-Cu for a few weeks now, but I’ve never done anything like this before and have no idea what I should be looking out for…

I know I should check the seller’s Certificate of Analysis (CoA), but as a beginner, I’m not sure about things like the appropriate dosage or how frequently I should be injecting it.

What would you recommend, and how should the injections actually be performed?

I’d like to know everything.