Hi @LizzieS and welcome to the community forum and to TrustedHousesitters. My suggestion is to first start by embedding your listing in your forum username/profile. That way experienced members can give you feedback on your listing content. Hopefully no one offers to buy your home, unless you want that too, of course. 
Your best chance of success is a well-written listing with clear photos of Fred and your home. For home photos, the main focus should be on the areas the sitter will be using - living room, kitchen, bedroom, and bathroom.
You can consider inviting sitters, in which case first try relatively local ones who have less experience. They are more likely to make themselves available for you. However, aiming to get applications is your better chance of finding the right fit.
Once you add your listing, I’ll be happy to give you some feedback.
Francine
Volunteer moderator 