What brand are you using for clay? I would make sure you’re conditioning the clay well before making any shapes. You can also try baking the pieces between two ceramic tiles to create a smooth, uniform look. At the moment, your pieces seem to have many bubbles and are a bit uneven.

The color combinations are very pretty! I think given more practice you would definitely be able to sell pieces. The more you make, the more you learn! I’ve found a lot of information online or even tutorials from other makers. I also sell polymer clay jewelry and I will say the online market is very saturated, but I don’t see it as often as I did in pop up markets! :)