Changing career - advice

Hello all

I hope this is the right area to ask this question - if not, apologies.

I have dabbled in web design for around ten years since I was a teenager (I used to design and run websites for popstars, actors etc - sad I know!) I even got paid once to design a website, but I didn't pursue it as a career choice.

I would like to pursue it further now, my ideal would be to work for an agency for a few years before eventually going freelance. My skills lie in basic web programming (HTML, CSS) and graphic design (Photoshop, Paint Shop Pro) however it is all self taught and I have had no formal training. I am looking to do a graphic design/web design course to cement my knowledge but my concern is that once qualified I might not be able to find work as I understand the industry in the UK can be one of those where you need experience to get experience.

What does everyone think, should I go for it or are the chances of me being able to find work as a web designer/graphic designer so slim that it is not worth it?

Thank you in advance
H