You don't necessarily need a qualification to find a job (job search for teaching assistant etc, try local council websites...), but maybe your employer would encourage you to get a qualification while you work - I think maybe there is a BTEC or something where they will watch you in class to see how you perform (you need to work in the school 16hrs+ a week), then I guess some college work, and after a year you get the qualification. I could have remembered that totally incorrectly though.... You never know, after a few months doing that, you might realise you can be a teacher after all.