Insulin is not something to mess with. You can very easily put yourself in a diabetic coma if you aren't careful.
Gh is pretty mild in the way of side effects. The problem with gh is finding the real thing. The vast majority of the hgh on the market is fake. I'm talking 90%+.
I often recommend the sarm nutrobal as an hgh alternative. It is an hgh analogue. It signals the pituitary gland to increase hgh output. You can read up on it more here: Nutrobal (Mk-677) Growth Hormone - Evolutionary.org