Go for a winch launch if you get the chance...
You'll be sitting in a much smaller space than you are used to, the people outside will be making all kinds of funny signals and saying things like all out, up slack or whatever. (I'm sure you'll get a briefing, I can't remember exactly)
At first you'll see the cable starting to snake through the grass, until it becomes taught. The glider will edge forwards and then before you know it you'll be accelerating over the ground and soon after that pointing skywards.
The attitude will seem impossibly steep. After a short while, and somewhere between 1,000 and 2,000+ feet you'll either pull off, or the cable will back release. Nose down, pull the release twice (Was in my day anyway) and trim.
Relax and enjoy...if you're lucky you'll feel a bump, hear the vario scream and start climbing in a steep turn while trying to centre in a thermal. If it is a busy day you may well be sharing the thermal with a gaggle of other sailplanes.
Ian