If you start learning everything you can on insulin, e.g. insulin sensitivity, different forms of insulin, your own fasting BG levels, post meal BG levels, pre, intra, post-WO levels, clearance time, how much insulin you require to drop x points, how many calories to eat alongside that insulin.... until you know all those, you're not ready, I'm sorry. It's so individual that nobody can even coach you through it all. Not even a doctor because you're not diabetic. But start by getting a BGM device and start monitoring your glucose waking, fasted, before meals, after meals, 30, 60, 120 min after meals, and before, during, and after training. But it's not as if this takes a year. A couple months and you should know what you need.
Besides food, there is nothing more anabolic than insulin and you will bulk up, but you won't like how you bulk up. You'll just get either fat or go hypo and feel like death. Either way, you'll hate it.
In the meantime, get some metformin and berberine and hit the books.
And no, you don't need GH to use insulin.