In reply to Simon Wells: I reckon the standard books on ski mountaineering are Bill O'Connors "Alpine Ski Mountaineering" Vol 1 "Western Alps and Volume 2 "Central and Eastern Alps". These guides, published by Cicerone, have an introduction to what is required, gear and technique - wise, and then details of a number of tours in the area. These are the definitive guides which most tour operators will follow, IMHO and IME.
First, you will have to define what your objectives are - mountaineering or skiing - a lot of ski touring is about finding pristine untracked powder and the other is to use skis as a way of travelling to climbs, then doing the climb, then returning. Most ski mountaineering is really just skiing with a bit of climbing, often non technical, because to climb you would have to carry a lot more gear than to ski. So skiing and skinning to the final ridge then putting on crampons to scramble up the final 50 metres. There generally won't be time for much more than this unless you are really hard core.
One way, which I would recommend, is to go on a tour with a ski touring operator such as Mountain Tracks, Pyrennean Mountain Tours, ISM, etc. and you should get a good introduction to the techniques plus the added comfort of having an IFMGA guide able to assess the snow pack and navigate in white outs. This should build confidence in going off by yourself next.
Another way might be to day tour with a guide prior to doing your own day tours, perhaps with a bit of bagging of easy climbable peaks.
I am always amazed and in awe of the areas I often find myself on ski tours and to think I could be by myself and a partner and having to be fully reliant on my own skills does concern me a bit! Once we climbed to the top and found the other side completely covered in cloud - the guide knew the way and found the traverse at the bottom of the slope to avoid skiing of the edge and falling hundreds of metres to a certain death. I too have done summer alpine stuff and scottish winter but don't feel skilled to go off without a lot more experience. Hopefully one day before I'm too old...
Ref "all this stuff about glues" - rent the gear first, glue on the skins to enable them to adhere to the ski soles, - basic. Don't know any ski touring near La Plagne but not to say there ain't.. HTH Mike