Any Trainee Dental nurse/receptionists about??

I have a few questions if anyone could help me..
I've an interview for a trainee dental nurse & receptionist position.
It's full time Mon-friday and i so badly need to change jobs atm!

Does anyone know how I would get trained as a dental nurse? as the colleges offering the diploma, before you can get on their dental nurse course you have to have three months work in a dentists.

Does this mean I would spend a year training as a receptionist then start the course next year?

Basically I'm studying Psychology distance learning and will go to Uni next year so I'm wondering if there's any point me taking a trainee dental nurse job, as next year I would probably find it hard to go to Uni 3 days and work/study as a dental nurse the other two.

There's a massive chance I may study with the OU instead so I don't want to rule out a potentially great job over "maybe"

Has anyone else done the same thing where they worked as a trainee dental nurse but went to uni for a different degree?

Thanks in advance!