T. If you have a simple and cohesive routine that encompasses pulling and pushing movements for upper body in the horizontal and vertical plane, and pushing for the legs, you will be off to a good start. Keep it simple, keep it brief and give it all you got if your doctor gives you the go-ahead. (But ease into it, and make sure you get the movements right.) You'll like the challenge, and true challenge is never boring. Also, relatively brief workouts won't be off-putting, so you won't dread the next one. You'll look forward to it. This I know.
Completely agree with this, and if coaches are anything in HK like the ones I see in Shenzhen, avoid them (from what i read they are not any better in HK)
Besides seldom looking like they seriously train (a few do) many seem to follow a similar routine where they have a moaning beginner trainee do several sets of the same exercise. If the coach has you squat on the first day until you are tired, than squat again after a couple of minutes rest, forcing some squats while you are cringing in pain, than this for a couple of extra sets, it is very likely you will be very sore the next few days and won't want to go training. Not sure why they love working like this, I see a coach sometimes having beginners do several sets of a whole bunch of exercises for the same muscle group. I 've followed this particular coach for at least a couple of years and never seen one of his student make sizeable progress (tthere are more serious gyms around, although the best athletes appear to be neither trainee nor coaches there).
Much better go for a full body workout with compound movements, 1 working set for exercise ime works more than fine upon getting back to teh gym (FF might link to studies to back it up) and you won't be that sore.
Watch out for squat upon beginning, it's possibly the most useful exercise but overdo it upon getting back to the gym and the soreness will put you off - I would stop your single working set a bit before failure, at the very least a couple of reps if you are just starting again.
Besides compound movements like squat and deadlifts are great but if you are not familiar with them, you will need some basic coaching, or at least have someone check up the form. It's not that difficult to do them wrong and hurt oneself, short or long term - maybe even hurt oneself when doing them mostly right, but it's probably more likely when working heavy.
And sure get a blood test, in some european countries doctors are not to up to date with TRT, especially general practioners, and put patients on antidepressors without even checking their test levels, yet there is a long litany of issues linked to low test, and feeling depressed is one of them. Also beeing overweight and sedentary seems to hurt test levels. Your levels might be quite fine, but it is a sensible complement to a health check up around your age.

