should I put this on my resume?

im revamping up my resume because I gotta switch jobs like yesterday LOL.

I started pet/house sitting at the beginning of the year. It's something I do under the table so to speak but I do have ads on Facebook, Rover account, etc. I am wondering if it something I should add onto my resume? It is a 'job', so I feel like I should. But I'm also not sure if it's worth doing.

For context, I am 20 (21 in fall), a university student, and only have retail experience.

TIA!