You actually don't need to start an Etsy after 3 months of pottery classes!! It's okay for it to just be a hobby!!
This is fully just me being salty and petty and I get that... BUT I'm so sick of seeing small pottery businesses where the creators behind the ceramics fundamentally do not have the basics of pottery down. Like with any craft, the "if someone's willing to buy it, then so be it" principle applies so whatever but that doesn't mean I'm not annoyed. It's okay to take some time (probably at least a year, if not longer) to focus on getting the basics down before we try to commercialize it!
But why are we selling things that people are going to use for food consumption before we can even get glaze application right so there aren't pinholes/defects on the inside?? People don't take this seriously enough, the risk of fucked up glazes on food surfaces is people ingesting what is essentially glass. Not cool! Hence why many seasoned (or even just people who take it a bit more seriously) ceramicists won't even sell pieces with internal glaze defects at a discount (or make them into planters instead).
The amount of beginner potters I see who can barely even throw a cylinder or center 2 pounds of clay that go "this piece will be up on my Etsy" ?? We literally see in your video that it's super uneven and wonky looking?? Why do you feel comfortable selling that to people? Or the amount of bowls and cups I've seen for sale where the lip is super sharp (yes, clay can cut you after firing if you don't take care to smooth edges) or the base is superrrr thick. These are pieces we keep for mementos and give to friends and family, not pieces that people should spend their hard earned money on.
It's okay for a piece to be wonky. It's okay for things to not turn out, especially when you're starting out. But we don't need to try and sell those to people who don't know any better about food / dinnerware safety in ceramics! Also bare minimum please learn these basics about what makes a surface considered safe for use with food by modern safety standards. Again, just me being salty as a ceramicist who sells work but is incredibly nitpicky about what I will "allow" for sale.
Ultimately, there is no real "bar" for when I think someone should or should not start selling their work... BUT there is a bare minimum which is taking the surfaces that people will eat off of seriously.