Hi @Pupsitter and welcome to the forum!
You have three nice references but you can always add more. After you have your first review, they won’t be as important. It might also be nice to have photos of you with pets, although your pics are certainly fine as they are.
I would remove some of the text about cats. A cat owner will assume you have no experience and be hesitant to select you. Litter boxes are a given and gifts brought in by outdoor cats occasionally happen. If you want to take care of cats, accept these as a given without mentioning them
Here is another very helpful thread to read: https://forum.trustedhousesitters.com/t/nobody-wants-me-advice-for-a-first-time-house-sitter/
There is a high demand for sitters around the holidays. Keep applying, look for short sits, last minute sits and local sits, especially where you would be able to meet the owners beforehand. I predict you’ll be on your way soon!