8 XXX : art improvement

[Art Week #12] Any ideas how to improve this before I start with the lineart?

imgur.com category @Hrusa

I've been practicing my digital art recently, and decided to practice with some ABXY Girl. Please tell me what I can do to improve!

imgur.com category @captaintaco2345

Two Hot Blondes Hunt For Big Black Cocks (art-style improves and changes through-out the comic)

imgur.com category @[deleted]

Home Improvement

imgur.com category @Lalo175