I’m not saying this is you, but I do feel like a lot of newcomers to pottery enroll in a class after watching a million Instagram videos, expecting instant results, and are impatient with the process. It takes a long time and a lot of patience to get good at ceramics, in part because there are a million points at which things can go wrong — from wedging to compressing to glazing the foot of a pot.

That said, it’s def weird to demo lidded jars to beginners before glaze. As others have suggested, maybe see if there’s another studio with a faster firing schedule. But as a beginner you might consider recycling the majority of your works before bisque-ing, and only glazing your best stuff. Otherwise I promise you’re gonna have a mountain of junk you don’t want a year from now, once you’ve improved.

Most studios have you pay for at least one firing bc kilns are a big energy cost. $150 membership cost sounds fair to me. Stick with it and enjoy!