Okay so I have tried this before in my life, a year or 2 ago, I found it quite fun even if I was terrible at it.
The thing is I am 110 kg at 1,75/1,76 cm or 5,9.
Don't worry, I am really not THAT fat, I have been lifting for 3 years now with pretty good gains. (I do free weight exercises with 16kg/18kg) And I am pretty muscular and strong because of that too.
But I want to do it, I am really not that worried about knee injuries and the like, but I just want to climb/jump etc...
So lose weight first? Or can I just do it while practicing?