So, does kitten fostering sound like a possibility for you? Foster parents are needed almost everywhere, but fostering is handled differently by each rescue organization.
Some organizations do not have a shelter and all cats are fostered in homes. These are the agencies that bring cats to stores like Petsmart and Petco for adoption on weekends (not to be confused with pet stores that sell cats from breeders – avoid those!). Sometimes foster parents will be asked to stay with their fostered cat for the day at the adoption location while other times another volunteer may facilitate the adoption process.
Since I foster for a shelter, the majority of fostered felines are kittens who are too small to be adopted. Most of the adults stay at the shelter full-time where they can be visited by potential adopters every day to increase their chance for adoption. I’m not involved in the adoption process and simply drop the kittens back at the shelter when they are ready to be spayed and neutered, and prepare for adoption.