The photo is a little on the blurry side, but after paging through your sketches I would say focus on under-construction as your next area of practice. It seems like you're jumping immediately to contour, shading, and even color, which, while joyous and fun to do, is really more finishing touches rather than a starting place. :)
If you're not sure what I mean, you might want to check out our 15 minute tutorial: https://line-of-action.com/learn-to-draw
It focuses on humans, but the basic concepts are very much the same.
Keep going with your practice! :)