Is it a good idea to be an animal sitter at 13?

Alright, so i LOVE animals and i need to earn some money because my parents do not give me money when i go out with my friends so i usually have to wait for a holiday to come by in order to get some money. But this summer i want to earn some money by being a dog sitter. Yes, i am only 13 but will be turning 14 in october and want to know if it would be a good idea to do this job. The animals i would watch are birds, dogs, cats, rabbits, and fish, i would not do and rats are gerbils because i dont have very good experience with them. Lastly if this is possible i would like to know how much eat animal should cost PER HOUR please :) and how i can spread the word that i am an animal sitter. I was thinking craigslist not too sure though.