Go to some open days at universities, see what they have to say about your previous qualifications. I went into my course without any healthcare experience, but had quite a few friends who are nurses and knew what I was getting myself into. Have a look on hospital websites about volunteering, however it can be difficult to get a space to do it as they can be oversubscribed. Care and nursing homes are always worth a try as is giving something like SJA a bash.