Are you a nurse applied as an NVQ student? Are u an RN? with exerience in hospital for a year? If yes, don't loose your hope as there are better place than UKIf your intention is really to travel UK, then you must I think apply tourist visa first. It's hard to convince the embassy about your genuine intention. But then you are always welcome to apply.
You're still young and don't loose your hope. Cheer up!
Goodluck