Go for it!
I did it 20 years ago, but got chucked out for bad behaviour just before I completed the training.
I thoroughly enjoyed it, it was great experience and in terms of preparing me for life compared favourably with going to University. (Cheap Beer, higher Pay and 120 hours hanging out of a Wessex)
In my day you got streamed onto a trade at Biggin Hill selection and then it was Swinderby, Finningley AAITC, Finningley ground school, streamed Rotary/Fixed, more Ground school then off to Shawbury for initial flight training on Wessex.
It is hard work but very rewarding.