If I can just chime in on the education thing, at the start of the last academic year I was at college (different thing here in the UK, post-16, non-residential, vocational education) and the majority of people were in the 16-18 range, with about two that were a little older at 22. There was one guy there who was in his late thirties or early forties (he did tell me, but I forgot), and although he left six-weeks into the course I wish I'd stayed in touch with him more than I do when I think about the other two (17 & 21) that I used to hang around with. For me to want to talk to someone off my own back takes a lot, I very, very rarely even consider it.
As long as you don't try and fit in with the younger guys by acting immature, because they'll just think you're weird and trying too hard, it shouldn't be a problem. And for the record, he dropped out because he'd been out of education for two long and couldn't kick his brain back into it, so maybe consider the shock to the system it'll be. I know my brain's dulled in regards to written work because of the year I spent at college because it was all mathematical and engineering.