In reply to NikLong:
Often you have to do an intro course at most climbing walls... Good way to meet other people.
Main skills you need to be competent at an indoor wall: tie in to the rope (figure 8) and belay.
I think even bouldering walls require some sort of induction process for insurance reasons these days so worth booking on one where you actually learn all the roped stuff too.
If you're still short on people to climb with, try looking for groups or clubs that meet. But it'd be worth going on a course first.
There are more expensive and more advanced courses out there, but for starters just get an induction at a local wall, once you've been regularly climbing for a few weeks you'll be better placed to go on a more advanced course