Hi @Kosha and welcome to the forum. Although it’s helpful to contact sitters directly, having a well-written listing with quality photos is the best chance of finding a sitter. Take a look at Angela’s top 10 tips for creating an effective listing, and see if you can make any improvements to your current listing.
You can also embed a copy of your listing in your forum username so that forum members can view it and perhaps give some constructive feedback.