If these are your natural numbers you should not be touching gear. Why would you want to mess with this? You should train your ass off and build some muscle.
You have naturally high test. When you introduce exogenous test your balls will shut down and you will be starting at 0. Taking 500 might give you good numbers or it might put you right back where you are now. As I said in my other post. Don’t mess with your hormones while they are good. Max yourself out naturally.
As one person said above, by the time I was your age or maybe 30ish, I had to “trt”. Maybe you could say cruise. Imagine 20 years later. It’s a personal choice to me. But if you were to dabble into this, you would want think about your actual first cycle and after PCT or cruise will be. That is really what you are considering. I have one young huge, lean friend that basically has to cruise at 250 a week. It’s just a personal choice again to me. And at least my doctor told me come off test when wife wanting to keep popping out babies and only take clomid. That sucked. Whatever you choose and when, more long term thought should be given into what you will do from then on.