No! She looks adorable! Keep going!

I don't think this is too plain, as this type of drawing has a long history in cartooning. It looks good. One little comment I'll make is to be consistent with your line weight. What I mean by this is, that on the back of the head, shoulder and hip you have made a thicker feeling of line which gives the sense of a possible shadow side ( something cartoonists do all the time) I would also expect that thickness under the left arm and the chin, nose etc. Not a shadow but a slight increase in weight. Just a bit to add line variety and set up your future painted shadows. Other than that, you have a very clear, clean character. Great job.

I agree with the comment from @Scott Kersey, and to me, it looks a lot like something drawn for animation.

This is really well done. I wouldn't say it's plain, more that it's clean and clear. 👍