I'm getting a bit bored and would love to start painting again. ( over 20 years ago) However, I'd also like to do some taster sessions for other arty things like sculpture, pottery etc and wondered if there was a course that does bits of all things arty?
Try your local FE college - whilst you don't say if you want full time, part time or just-for-fun evening classes, many will do something like that.
You could also try your local community centre or similar. They will often have adult ed art classes, and you could take a smorgasboard of different courses - painting, pottery etc.. One example would be Bristol's Folk House, though you don't say where you are in the country.
Our local College of Art do taster sessions for different arts. Depending on where you live, you might want to see if there is one local to you (there aren't that many of them left any more) and take a look at what they offer on their website.
If you wanted to do a full time year you can do a foundation year in Art at many universities - this would cover whatever range of art subjects they offer - fine art, photography, ceramics, glass - all depends on the university.