It's actually not that bad for a beginner, but there are still some kinks that could be worked out.
Here's what you could improve on:
the background looks kinda goofy unless that's what you're trying to convey. It doesn't seem to fit this particular character. Her outfit is very colorful, but then it would make sense to have a more plain background so to have the focus be more on the character.
On other thing is her hair. Have you ever seen someone in person with hair like this? It just looks unnatural, as if it were painted on. She doesn't even have ears, and that makes her look inhuman. I suggest studying from real life and also checking out some tutorials.
Here are some tutorials that may help you : [link] , [link] , [link] , [link]
(just one last thing; she has no eyebrows. Not sure if that was intentional but just thought I should let you know.)