I'd just be patient and gentle. Protect her. This is a normal cat except for not being able to see. So help her as best you can. She'll eat, use the litter box, hang around and even play in her own fashion (might be interesting to see what games she comes up with there).

Keep her inside; this will NOT be a good outdoor cat. She's way too vulnerable.

A friend has a blind cat named Missy Kitty who is four years old. She has her own routine and knows her human's routine, too. After someone has a shower in the morning she waits, then goes to the kitchen to wait to be fed. If there's a patch of sunshine by a window she finds it & lies down & goes to sleep there. She's terrifed of the vacuum. She has a favorite spot and it upsets her if the furniture is re-arranged.

She has only been out rarely, under close supervison. There is a fenced back yard she explores under careful watch, moving slowly and smelling everything. The dogs that live there are curious but have never hurt her or played rough.

So there's no need for sadness or dismay. Just protect her. She cannot defend herself or run from danger--so keep her from harm.