I have this exact same mindset now. I am 33 and have put enough junk through my body over the years. I actually made a post recently to see how people keep good health on TRT and the response was very limited.
I personally work with my Doctor and use bloodwork for identifying any abnormal activity. Adjust doses and keep all the ancillaries on hand if needed.
I think one of the best ways in my opinion to remain healthy is not to 'supplement' with what we believe will help us but to focus on what can make a difference with that's been proven. For me i am very active so from a cardio standpoint it's a daily addition to me. I do throw in high intensity cardio now and again just to max my heart out and keep it in good condition. The most important part though for me is DIET. what we fuel our body's with on a daily basis. I use to be the classic bodybuilding diet eater and would be all about the macronutrients and putting on mass. Where as now i focus a lot on foods which are proven to be a benefit to your health. I think one of the healthiest foods is liver. I honestly hate the taste but i still incorporate it into my week. I would say liver is the most nutrient dense food we could consume (Quality source though) another is fish oils and cod liver oil. Apart from EPA DHA being incredible for us overall and has been studied to show reduced inflammation it also has every fat soluble vitamin their is. So i also include cod livers and i use Salmon to boost the EPA DHA content of my diet. I am also very picky about fat sources in my diet. I keep my Omega 3's much higher than Omega 6's. Sounds like a lot to keep track of but once you know the foods to eat you just incorporate them without even thinking eventually.
It's actually scary when you see how much people just do with their body's just to look a certain way or feel a certain way.
A lad i worked with (This is going off the topic btw but just to fit it in and show what can happen especially with our body and overall health) he was 27 and was a decent enough guy. Had a wee boy (2 year old) and a nice girl he had been with for years. I came into work one day to find out his mum had found him dead on the bed. He had took 1 party drug with all his friends on a night out (he very rarely use to touch anything like this) and he went to bed and in his sleep took a heart attack and passed. All from 1 street drug? So it just shows that even if you don't 'abuse' things it can still have a dreadful outcome. After that i really kept on top of my health as i was always slightly paranoid about TRT and overall health. Especially when i use to knock back tons of pre workouts and fat burners etc completely sttessing my heart and cardiovascular system out.
I do what i can to stay healthy these days. Stopped all alcohol ' Don't smoke' Good diet and kept in relatively good shape.
So it just depends how much you value your health tbh. In my early 20's i didn't care. Party drugs and drinking for days on end. Not even a single thought into if i was creating any damage but now i am all about keeping healthy... Without your health you have nothing