Complete beginner spot around South Manchester

[Skirrow]

Hi, I've just ordered a couple of MBS mountainboards (comp 95 and a comp 90).

Never been on one before. Can anyone recommend somewhere around south Manchester kinda area that has a nice wide, gentle grass slope for me to learn the basics on?

Also, which board would I be better learning on? I'm about 5'11 tall, 10.5 stone, no experience (snowboarding about 15 years ago)