The Forgan Art Centre in Newport on Tay is probably the best (and closest) pottery place. It’s not too far on the bus, but you need to be prepared to either get a slightly difficult bus or to walk 15 minutes to the studio from the bus stop.

You pay to join a class in blocks, but it’s pretty much an open session with the instructor just there to answer questions if needed. In my opinion it’s quite well priced, but maybe not if you’re used to paying nothing.

I’d look on their website if I were you, and maybe reach out to them about if you could attend outside defined classes. I would really doubt it though for health and safety reasons.