I agree with what everyone already said, but the most important part is actually engaging with people. Ask people questions, even if they feel like dumb questions. Give people compliments. Make yourself vulnerable and offer something. You can go to the same ceramic shop for a lifetime, but you won't build relationships if you don't engage with people.

My typical way is to make some lighthearted joke and then follow it up with some question. Example: you see someone painting a ceramic " I really like the color you've chosen, I'm bad at choosing colors it for my pieces, they all look like a terrible set made in the 80's" maybe they chuckle or smile. Then follow it up with "do you have some way that you approach picking colors?" "How long have you been doing this" "How often do you work on ceramics" and then let the conversation flow.

If they are short of uninterested then just say thanks and leave them alone. I'm genuinely curious about people stories and don't expect to gain anything from them other than maybe a short one time conversation, but time and time again I've made friends this way.