I like it! Very cute and i think will look cute on my page
It looks accurate to Crystal's design and the pose is very cute!
I think the coloring could of done with a tad more work and more detail as well as anatomy and proportioning I also personally think her facial expression could of donw with more depth to it. i havent tried it out on my page but i will tell u when i do!
As you said you struggle with drawing humans this is good for a try!
Well done and thank you for drawing Crystal! Keep improving!