For such a little one, simple options are ideal. You can choose coloring pages at https://wowcoloring2kids.com/catnap-coloring-pages/ with large shapes or individual figures so she can practice her hand grip and movement without being limited by lines. You can also let her draw freely in magazines or on sheets of paper, developing her imagination and experimenting with color. Over time, she will learn to combine free-form drawing and line coloring, but for now, the most important thing is to maintain her interest in creativity and give her room to experiment.