If you put your postcode into the SW website it will tell you your nearest class. Unfortunately I can't help much as I'm in Huyton, so no idea which classes are good etc.
Good luck with your weightloss, this forum is great you'll get loads of support xx
Sorry I can't help but just wanted to say welcome. I'm a scouser who grew up in Aigburth but had to move to Leeds for hubby's job and really miss Aigburth (even after 7 years).