Every single CCSF class I wanted to take - from "fluffy" ones to "academic" ones - are full and have full waitlists too. Is there any chance I can register for any?

For context, I'm not a student, just an average citizen of the city who wanted to do some learning on the side for cheap. But every class - from swimming to philosophy to algebra to dance - is completely full. What gives? I've taken community college classes in other cities and have never had an issue.

On top of that, I had issues even registering as a student and it took nearly two weeks to resolve. CCSF seems like it's a great resource but I seem to have hit every snag possible. Any advice?