Long session from photographs© 2019 Lamuya
Good perspecive and countouring. I would focus on making the shadows stronger to define forms more and make objects look less flat. This looks like a great base; add value shading and keep going!
More from Lamuya
I can see, that your proportions are right and perspective somewhat too. Now i would try to push the contrast to the limits. Changing the tools can eventually help you with that.
PS: Drawing from life will stretch you more.