Hi Darren,
You just come along to a meeting, it's as easy as that
Have a look at our website (link below) for more info on our branch - the next talk will interest you as it will be with Ralph Martin with a talk on South Africa, and I expect you will see plenty of pictures of Haworthia, Gasteria and Aloe in habitat...
Meetings are held on the University of Birmingham campus - in the horticultural training centre at Winterbourne Gardens. If you'd like to know anything specific PM me if you like - Ralph might bring sales plants and there are usually some available from other branch members as well...