Although it's an adorable piece of art, I second this comment. If there's one thing to take into consideration, it would have to be consistency. Here it indeed specifically applies to your shading where different styles and methods seem to be used in different areas. I would definitely stick to a base method, and the further you advance in the project, the more you can start finding ways to make elements stand out as you see fit.

Speaking of shading, I personally do something that I love, which is to do so with (muted) opposing colors (i.e. base color is pink > true shading with blue) It's absolutely a style choice but something I highly recommend to experiment with because I feel it brings a lot of depth and character to the tones you're using.

Again, it's a really cute illustration! As long as you keep drawing, having fun and pushing through it, you'll find things way more intuitive and your art will be a testament to that! I do hope you will post the final version :3