>>2156051If you've been bouldering outdoors then you'll have no problem with the actual climbing. It's the rope management that's going to take some practice. Take a belay class at your gym and then find someone who knows more than you do and tag along. Alternatively, you can find a mountain climbing guide book or something. I'd be careful learning from YouTube.
You're on the right track, though. Bouldering outdoors got old pretty fast for me. Climbing walls is way more interesting.