I certainly don't claim to have any great expertise in answering questions like this. In fact, I have to admit that I hadn't even got the slightest idea what you meant by a 'Foyer' when I first read your question. However, I've done a bit of websearching and learnt a bit about the Foyer network from their website, here:
http://www.foyer.net
As I read it, the Foyer network is a fairly loose federation of groups, within which each one can adopt its own practices. (i.e. although one Foyer might not be able to help you, its still possible that another one could).
Also, as I read it, Foyers are primarily set up to help potentially 'vulnerable' young people, with the prime criterion for assessing 'vulnerability' being homelessness.
However, I can't see anything which states that you actually have to be homeless. It's possible for example that 'family breakdown' (which could potentially lead to someone becoming homeless) could also be regarded as a relevant factor.
The only way that you'll get a definitive answer to your questions is to contact each of the Foyers. It seems that there are only three Foyers in Wales. You can find their e-mail addresses here:
http://www.foyer.net/mpn/topic.php?query=&topi c=68
(I suggest that any e-mail you send should include your phone number as the recipient of the e-mail may want to discuss things with you).
Could you cope? Probably the only person who really knows the answer to that question is yourself. My personal feeling, however, is that someone who has the confidence to ask this question and the intelligence to write it in accurate, clear English (as you've done) would probably enjoy facing the new challenges and rise to meet them.
As I've said, I'm not an expert - but I hope that thi