I know you where questioning how you colored it, so I'll address that first. This is really well colored and it pairs quite well with the lighting streaming through her wings and bouncing off the clouds. The hair is also very pretty. I think my only tips would be on her overall appearance and her right arm. I have to be honest, at first (without reading your description) I thought that this was young Celestia. Even once I read the description, it doesn't have much resemblance to Nurse Redheart, but I wouldn't be able to tell you why. As for her right arm, I think the base is a little bit too wide. This is, however, a minor adjustment. Over all this is a really good piece. The more I look at it, the more I see Nurse Redheart. Great job, and keep up the good work!
Thank you for the feedback, I appreciate it
Yeah, I tried to make it look like her, but I agree, I probably wouldn't be able to tell it was Nurse Redheart either. And good catch on the right arm as well.