I would have a look at working with cancer charities, if you're looking for another route to go down. I've been in touch with Macmillan in my area and they have a programme on at the moment for helping older people deal with cancer, so as soon as I get back to university I'm going to hopefully get involved with that.
I'd get involved with the local community rather than trying to apply on a big basis. I'm not entirely sure of qualifications or formalities, but maybe contacting your local hospital and seeing if there are any support groups that you could possibly assist in? Could be a good place to start.
Also, on an even more local scale, does your university have any peer support counselling groups (where students can opt to do "counselling" and talk to students that are having problems)? A bit of training often comes with this, and can be a fantastic way to open doors into more specialised work - and I'm sure the training will also look good, even just at a basic level.