Start with a base. I always choose the head shape first, but you can start with her hair or clothes if you want.
If you have trouble don't be afraid to erase and start over!
Once you have the head drawn, add the eyebrows and hairline so you can have an idea on where the rest of her features should be.
Add her eyes.
Draw the cloak around her, using her face as a guide.
Add her lips and you're done!
If you have any questions feel free to ask!!! Please follow! More to come. :) Which princess next? Or any character at that matter. (: