Thank you for the tip! For now i am trying to get used to the heights on some Via Ferrata hikes. Starting with easier ones and will try to forward to some harder. I must admit, that i am facing heights much easier when I'm buckled up to the steel cable. The narrow paths without anything secure to hold to are the problem :) So i guess i could try some climbing.

When i was a kid i dreamed about the indoor climbing. But back than there wasn't this option in my town. Thankfully it is now, so that kids can learn this from young age!