In reply to mypyrex:
Do it.
Do it.
It can be quite demanding physically, but a good level of rock climbing fitness is fine to get you going. Technically its not all that hard once you've picked up the basics of stepping up rather than pulling up, keeping heels low etc and trusting the points. A couple of indoor sessions would be ideal for this then do an outdoor route next season, either with an experienced leader, or a guide.
You would realise what you've been missing all these years!!