Thank you so much for the feedback!
The eyes are what made me struggle the most, and looking at the piece now U see I still need to work on them some more. I'll resize her left eye, shrinking it a bit.
As for the chair I noticed how the top is not as highlited as I wanted it to be, causing this blending with the background as you mentioned. I'll add more lighting to it!
I'll look into reference images fir textures and such fir the materials. I'll experiment with some brushes and try them out!
Thank you again fir the criticism! I was very worried about the character's anatomy and the overall image's composition. I'm glad these are not at least the main issues of this artwork.
I'll fix what you've told me that doesnt look right. You helped me a lot! I hope I'll manage to improve and come up with better paintings