Still lives are a great way to learn because you can control the space. It’s easy to set things up to explore composition, chose props to learn about how different objects react to light etc.
And usually the objects stay where you put them so you don’t have the frenzy of other genres where things change.
Oysters are difficult because they will spoil under the heat of any lights and as light is usually the most important thing in a still life it’s a difficult subject you have chosen as you will not have much time to finish the painting.
To me what you have here is very flat because of the even lighting there is no variation of light or composition, the spacing is very repetitive. The out side of an oyster is interesting because of it’s rugged texture and how it contrasts with the softer interior. If some of the oysters are positioned to show the out side and some the inside you could emphasise the contrast.
“What peaches and what penumbras! Whole families shopping at night! Aisles full of husbands! Wives in the avocados, babies in the tomatoes!—and you, Garcia Lorca, what were you doing down by the watermelons?”
— Allen Ginsberg
Are you ready for a Journey
PS Critiques always welcome but no plaudits or emoting please.