To second what Kev said, I recently joined the Halfwayup lot on a "gentle" ride they organised (like you, I'm in the process of coming back to MTB after a prolonged gap). Very friendly lot, and the ride was a very interesting route but not too technical, so look out for something like that.
sorry i missed that ride mate, the gf was hungover and spent all day in bed so i had to look after my boy
*thread hijack over
thread hijack over