Hey Raphaelle, I like the vibe of this piece, pretty cool. What I think you have to do when working out poses, is to fill it in to see the silhoette it makes. This is the eyes first read of the pose, and it should be clear. In your pose, the left arm is missing, and when I fill in the pose, the silhoette looks unclear. I did a quick sketch to show you how you could fix that. As far as your painting, it's also a little confusing. Mostly because you have light areas that shouldn't be in the dark areas, and the color temp of the light is all over the place. I did a quick paint over to show you what I mean, I hope all this is helpful :)
You're really doing good. I was also stuck at improving, but learning about different artists and watch their tutorials helped me in every way like playing with colors, making the painting look so much fun(I recommend Marco Bucci), studying perspectives, compositions and anatomy(David Finch). When I discovered these people, I was drawing for 2 straight days, I just cant stop haha.
Hey @RaphaelleDae! I'd love to see how this ended up or if you did anymore! If you did want to push the concept more, it'd be cool to explore different ways the character could relate to the lizard. Either way, I like the painterly quality you have in these!