Do I need a business license to be a Rover sitter?

I live in Los Angeles, CA and I was wondering if I needed to have a business license and/or insurance to daycare and board dogs at my home if I'm a Rover sitter. I rent a duplex home and I got permission from my landlord to daycare/board dogs for temporary income since I'm currently unemployed and pregnant, however, my neighbor had asked me if I was licensed to run this dog care business and if I had insurance. Before I register my business with the city, I was wondering if this is something that is absolutely necessary. I don't plan on doing this as a career (only 2 more months) and I find it hard to imagine that every Rover sitter would need to get a business license or some type of special business insurance (and Rover provides insurance as far as I know). Thanks!