You need to get into much better shape bro before starting any steroid cycle. Sarms might be a better option for you right now. Let me know if you need help setting something set up.
Also you obviously have no idea that cutting off the pathway sperm production from your testes, has absolutely nothing to do with hpta or test levels whatsoever and does not affect it in any way shape or form. Your doctor should have explained that in your consultation.
A vasectomy will not give you low test or lower it in any way