Stuck

I have a faint idea of what I want to do in life. The problem: parents. They'd rather I didn't go abroad because I should be paying for my keep rather than a gap year. They don't want me to volunteer even though it could be a way into the job I want. And yet they don't have a problem with me going to uni and accumulating loads of debt. WHAT THE FUCK? I'm so sick of my money orientated family. To them it doesn't matter whether I'm happy or not in what I do as long as it pays well.
So what do I do?
I have no support at all, very little motivation to even get out of bed never mind plan how to convince my family that money isn't the only important thing in life.
Am I so selfish for wanting a job I'd enjoy? According to the family, yes. Is it selfish for them to want me to give up going abroad and volunteering either abroad or here so I can pay my keep? To them, no it's not. To me, it is, cos I'd pay my keep anyway. But to them, charity begins at home so I shouldn't bother volunteering even though it's what I want to do.
So I'll give up what I want to do. Cos clearly I'm selfish and need to sacrifice my happiness so mum can get a few more quid a week.
Fuckin hell.