Is it hard to find an audience for a story about an elderly person?

Hi everyone,

I'm trying to write an adventure story where the protagonist is a 75-year-old woman. However, I'm a little worried about the audience. It's adult fiction, but I feel like it's a little unusual for the protagonist to be this old. Do you have any advice on writing about elderly characters?

Thanks.

Is it hard to find an audience for a story about an elderly person?