I want to drop out of university and re apply next year. What do I do?

I'm currently in my first year of university studying psychology, i started in september 2014.
I have now realise that this isnt what to do and I want to apply to do Graphic Design at a different university in september 2015.

Would the best option be to drop out now and re apply through ucas now or should I finish my first year and apply through ucas as well as still being here (if thats allowed)?

the only things stopping me from dropping out now is that..
1- would it look bad? would the new uni that im applying to know that i've dropped out and would it affect my chance of receiving and offer?
2- i've never been successful in getting a job (i have been trying) as i have no experience at all. I could maybe try to get volunteering which may lead to a better chance at getting a job?

Also how would student finance work? What loans would I receive from them if I were to re apply and start a new course next year/would I get any money at all?

Basically what would be the best option for me to do in terms of ucas/student finance? Leave now or finish the year?