I have never in my life read a book where a sighted person wrote out of the perspective of a blind person and got it right. But other sighted people don't know that so well... Good luck friend!

I have ROP and was born bblind. https://en.m.wikipedia.org/wiki/Retinopathy_of_prematurity

Is the girl going to be completely blind, or is she going to be visually impaired?

I'm asking you this question, because there are lots of illnesses you could take inspiration from, and should always keep in mind that most of the people who are legally blind tend to have some vision left that may be of use to them.

I for instance can see enough lights, shadows and shapes to navigate familiar places. I can't however recognize people on their looks.

I wish you the best of look with your novel. I'm writing a novel myself, which has a visually impaired character in it, but she isn't the main character. Feel free to pm me, if you want to ask me about my visual impairment for example.

I had retenablastoma, and I'm totally blind. Both of my eyes were removed by the time I turned 3, and they have been replaced with prosthetic ones. If you have questions about how to write from a blind character's perspective, feel free to pm me. Please remember that we are capable of being just as judgmental as a sighted person. We aren't separated from the knowledge of what's considered cute or pretty or attractive. We care about appearance, even if we can't notice some details on our own. If someone tells me that some guy's hair is ugly, it's still going to matter on some level. Personality is huge, as is voice, but don't be mistaken: blind people can be cruel toward others about physical appearance. Some aren't, of course. Some of us don't care very much beyond the obvious: body shape, height, hair length and texture. We're all different in what we like and dislike, or tolerate, or how critical we are, just like sighted people. :)