Yea dude free style rock climbing is super intense, demanding and DANGEROUS!
I have done quite a bit of climbing in my time and thankfully have never been seriously injured, though in my mature old age I have given most of the hardcore stuff up hahaha.
I wish I was as old as you dude!
I may give it a shot, but will have to train up a bit more (a lot more).
Yes rock climbing even in an indoor gym is a FULL body workout!
Its a good place to start cause its very safe and u can find routes that are on the easier side. It will be good for you, get you in shape fast!
Go for it!