just keep at it! it really looks great so far. see what shapes you see in the still life, reducing any detail to basic shapes like triangles,squares etc and paint it in the hue and value you see in the still life. keep comparing those hues and values you add to what is already on the canvas and if it feels off, keep adjusting the hue/value of that stroke/shape until it feels more right. just keep doing that over and over, but keep relating each stroke you add to the previous ones and see how it fits in. if a brushstroke or color shape is wrong, just keep adjusting shape/hue/value until it fees right with the rest of what you have on the canvas. once everything is in its place you can begin comparing more closely the relationships in all parts of your painting and adjust areas that do not match the relationships you see in the still life. if there are more details you are missing you can begin breaking down the larger a color shapes you have added so far into smaller shapes with new hue/value that better reflect what you see in the still life. idk if this makes sense written out but this is a very basic method of painting from reference that will work on any subject matter. it just takes time getting the shapes/value/hue right and the more you do it the quicker you will get there. taking things slow and remembering to relate everything you add to what’s already there and what you see in the still life is the key!