Wow, this is a huge improvement.... When it comes to shade, like I said.... Reduce the air brush shading, and avoid using pillow shading ( When you brighten everything in the center or darken everything in the center ) Try to put a focal point.... I am seeing a ton neater lines..... What I remember you told me, you use Pencil 2D.... Use a digital painting or line work focused program, not animation. Free Alternatives: Krita, Fire Alpaca, Medibang, ( InkScape for Vectors over pixels )....
When you are shading. Shift the color of the shadow and the highlight. There is a warm side, and also there is a cool side. You can shade with warmth, or cool.... I am very hyped you are using perspective..... Though look up reference photos ( all artists use them ) and practice it everyday and you will get better... I find this is a tad rough around the edges, but a dramatic step up in the right direction.... Look up tutorials on color values and digital painting...... Try to experiment with your line artwork by putting a color to it.