Hannah,
I keep my horse in a lovely friendly livery stables in Over Alderley called Oldhamswood, the owner is currently looking for a trainee groom. I’m not sure if this would suit you though as it would involve training alongside the job at college and probably more suitable to a school leaver.
Next door to Oldhamswood is another livery stables called Finlow Hill, you could try there also. They are both on Finlow Hill Lane and very friendly.
Mobberley Riding School is a possibility also as its a very busy riding school, maybe they need an extra hand.
Failing all this and you still want to get back into riding have you considered part-loaning? Alot of people do it at our yard and is much cheaper, around £30-£40 a week to have the horse 3 full days a week.
Good luck in your quest for some Equine Exhiliaration!