Supplements for a 47 year old ?

I am 47 and have stayed in decent shape just from being active and lucky. I am 5’10, 180 lbs, I have started working out harder and on a more regular basis lifting and running 1.5 miles 3 times a week.

I am wondering what your thoughts are for a supplement, protein, creatine? I have recently started taking 50mcg levothyroxine for hypo thyroid.
I have also a few years ago had my blood test results come back with a higher than normal creatine level from my kidneys but later test showed it to be normal.

I am curious with the once high creatine level and slow thyroid if these supplements would be bad.
Also I am curious how much protein and when you guys suggest for me to take.

Thanks