Thanks for your replies everyone 
LEM thanks
I'm so sorry to hear about your Mum's cat - how are things looking? Well done to your DD as well for persevering when she has mental health difficulties - she sounds like an absolute credit to you 
Ceebs I'm 25, and work as a tutor at the moment. I'd like to work in a full-time job, and ultimately, I'd love a job where I can help people and do good and make a positive contribution to society. Tried teaching but was absolutely awful - didn't work out.
I'd love to be in a job that involves writing and using languages, if possible (I have an Oxbridge Languages degree). I'd also like to be in a well-paid job (I know it's a bit taboo to mention it though). I just can't find something that is well-paid (I'm based in London) but that also helps people.
I was seriously looking at going into communications (embarrassingly, probably because it seems quite glamorous). It seems like utter bullshit though, and like it's just spin and doesn't help anyone or do anything constructive (just my personal opinion).
I'll start volunteering as a school governor from September (I'm really interested in education), and have registered my interest in volunteering with a Citizens' Advice Bureau. I've also started volunteering again at a hospital radio station, and with Girlguiding as a Brownie leader.
I've always wanted to go into journalism, but it seems like there are no jobs anymore. I worked unpaid in journalism every summer holiday at university (my parents were fantastic, and helped to support me), but couldn't afford a Master's qualification, and have heard it's not necessarily particularly useful. I can't afford to do anymore unpaid internships.
Clarky thanks 
- I'd love to work in a (fairly well-paid?) job that genuinely helps people and contributes to society. I'm not sure which field. I tried teaching, but it was awful - I resigned from a teacher training course as it didn't suit my personality at all, and shattered my confidence. I was really ineffective and wouldnt have helped the students at all if I'd stayed any longer.
- Not sure whether I'd need any further qualifications.
- Have a French and a Spanish degree from Cambridge.
- I'm not sure :( I've looked into volunteering, and will start roles with Citizens Advice and Girlguiding, and as a school governor and with hospital radio. I would love a full-time paid job with good career progression.