Bunny!

Hi, I haven't seen you around before, so I just wanted to say hi first, and glad to see you participating in TfE. Cute pony design!
I like the way the background of this piece is blurred and out of focus, while the characters are in focus.
It seems like there's a lot of black and white in the shading and lighting here. One quick way we as artists can improve our rendering skills is to shade and light with different colors. You could use a similar color as the character or environment your shading, but it only works if it's a different hue, not just the main color darker! To make something really pop, you could use contrasting colors (such as dark blue shading on orange things.) Personally, I like to think about what color of light my light source would be, and use a bright hue of that for lighting.
Shading can be difficult on a pure black character, but I see you've already made her a lighter black so the line out shows. Good work!
Can't wait to see more from you <3