In reply to ROSP:
I'd skied mostly on piste with a small amount of off-piste for about 7 years before I did any touring. I did a 2-day course at Glenmore Lodge which was basically an intro to ski touring aimed at piste skiers who could ski red runs. That was pretty good, taught me how to use the kit, how to get skins on/off in a hoolie, how to do kick turns, how to use ski crampons etc.
From doing that I basically bought the kit (skins, skis with touring bindings) and just went on small forays from the ski lifts to begin with. Once happy with the kit and transitions from skin - ski - skin etc I went on longer tours on relatively easy terrain. E.g skiing off the back of Cairngorm then skinning back up, out to Ben Macdui and back again. Over time I did longer days (ski centre, Macdui into the Lairig Ghru, onto Braeriach, back to Lairig Ghru and out via the gap) and have done two trips to northern Norway where we toured 7 days in a row.
When I started ski touring I was already a competent summer/winter walker and climber thus had all the mountaineering skills, navigation knowledge etc thus if you don't have those skills you probably want to gain them first. Being in the middle of the Cairngorm plateau in a white out on skis is not the best place to discover you don't know how to navigate!
Since my initial 2 day course I've done another 2 day workshop (also at Glenmore Lodge) looking more at technique, skiing steeper stuff and skiing different snow conditions. I've also done an avalanche awareness course, learned (and practiced) how to use a transceiver, probe, shovel etc.
If you already have the winter mountaineering skills, navigational skills, avalanche skills (both awareness and knowledge of how to used a transceiver etc) then going from piste skiing to touring should be relatively straightforward. An intro to ski touring type course will give you an idea of whether you'd enjoy it without buying all the kit (ski touring is a good way to get empty your bank account) and is likely to be a lot cheaper than using a 1-1 guide. I don't know anything about ski touring clubs so can't advise there.