Go into Nursing, it's great, never have to do any work, spend long periods of time on the sick, get paid too much and a ridiculous pension at the end of it – I know cos I read it on here.
Serioualy though, I trained in marketing, found it mind numbing, worked as a bouncer for a few years which was good money for easy work, then in chemical production before finally training as a Nurse and ending up £14K in debt to fund that training.
Love the job most days and, occasionally, someone appreciates what you've done for them which is nice.
If you have a desire to do something then look at the options, do your sums to ensure you can afford to do it (or at least afford the debt you'll run up paying the bills whilst training), make sure you have family support then go for it. If it all adds up then go for it, you'll only regret it later if you don't.