Pull bloods, cruise for 8-12 weeks on 150-200 test (spend 3 weeks with 0 shots so test levels can clear out, pull bloods again, and seriously evaluate where your health was, where it is after that modest cruise, and the timeline for a show. Keep training hard and stay on your meal plan same as if you were blasting. You should not lose any real muscle, just some water & glycogen in a few months of real TRT.
Consider there will always be more shows, so you don’t need to rush into one. A healthy low stress body will grow better, cut better, and look better on stage even. Playing the long game produces a better competitive result.
Even if all you care about is competing, no eye to the future, you need your health to do that well. And I promise there is lots of other awesome stuff in life you’ll enjoy too if you stay alive long enough, but you will need your kidneys & cardiovascular system for that.