~Please ignore the stars, I find them to be irrelevant when critiquing~
Hello! I'm here to help since you've requested some critique! Please keep in mind that my art isn't perfect either, and we're both artists striving to get better (: . I hope you can take my advice and use it to your advantage!
Okay, so, first of all I appreciate the hard work you put into this and how much fun you seem to have had with the hair! However, since you chose to do lineless you seem to have lost her chin. Her head just blends into her neck, so try using a darker shade of brown to make an outline of Merida's chin. That way you can get more depth AND be anatomically correct! ouo~
Next is the eyes. I understand the need for big eyes since I myself draw in an anime fashion. The coloring in the is nice but they are very, VERY large for her head. When drawing eyes (all styles) generally you should be able to fit another eye in between the two eyes on the head. This way you will get proper proportions on both the head and the eyes themselves.
I think that's all the critique I can give on this picture. Have fun practicing and you'll be great in no-time! Have a great day ouo~