I think it’s best case scenario. Our test obviously drops after 40. If you need an extra burst in gym at 50, go for it!
500 test is high to start with. Maybe hit 250-300 for a few months and see how you like it. Come off, run PCT then try again in 6 months. Slowly add other products based on your goals.
You could do that for a few years before jumping into TRT. I don’t really agree with anyone using steroids under 40, unless it’s medically required or if you’re on stage.