Thinking about being a shopper as a side gig. Is it worth it?

Not sure which flair to pick but seeing as I’m Canadian let’s go with that?

My main job is a grocery cashier. So I work less than 23 hours a week. Minimum 1 day off a week if they don’t call me in to cover. But I’m still behind on bills. I have a toddler and an older neighbour who doesn’t get out much so I’d like to bring them along for the journey. So I’m reaching out here to see if there’s any input I should consider before I go through with this idea. Any ideas or tips or whatever input would be much appreciated. Thanks!