Star, you never KNOW, you feel. Everyine wants to sit down a write a best seller, and they HOPE they are but they NEVER KNOW it until it is done and 'out there'. Stop worrying if anyone is gonna read it, or if anyone is interested. Write because YOU want to, and write because you have a gift that MUST be shared with the world. Whether it's the WHOLE world, or just a small part of it, it doesn't matter.
Writing from the perspective of animals can be HUGELY popular. I am a Dean Koontz fan and one of my faves has half the book from the perspective of the dog, and his thoughts and thought process. I've read other books which were huge flops when first published, but then 10 years later, a shift in interest caused the book to become widely popular.
And if you don't know where to start, start several different projects at once, and see where they lead. I forget the sculptor who said it, but essentially the sculpture is already in the marble, the artist just releases it. You have the stories, you just need to release them. Set all the worry and "what ifs" aside.