If you're still reading, Esmerelda, there's a vibrant and varied bellydance scene in Manchester, so anyone who can't find a bellydance class there has not even started to look.... but dancing in small restaurants to middle class white people in the middle of Manchester, UK. ...
Let me recommend Tracey Gibbs, of Taste of Cairo, who is an excellent teacher, and who runs a bellydance performance agency, and can therefore give a realistic appraisal of your readiness to perform.
Bellydance Workshops/Classes Manchester with Tracey Gibbs - Taste Of Cairo (The UK's premier belly dance agency)
But honestly, Google is your friend, just search for "belly dance classes Manchester"- it brings up loads of options.