What job should I do?

I'm stuck, please help. Like everyone else I want an interesting job. Ideal job would be screenwriter but so far no luck. I have no qualifications in that area but want some experience working on set etc. I understand how difficult it is to even get unpaid work in the media and so want some advice. So do I try to get work experience and quit my very boring, not very well paid 9-5 job. Or, do I keep the job and try to write part time?