Roooooob
You don't mention where you are in the UK; Bicester has a very active junior scene, and a good mix young and middle age pilots. It's well priced, it's an easy site to fly from especially if you are learning.
Now is the best time of year to learn to glide - with a moderate level of commitment you'll be solo by March / April just in time to make the most of the soaring season. So many people start in the summer but don't hit solo until the best of the weather has passed. If you can hack flying in the winter, summer is a breeze.