i guess my cousin, may, could consider having you as her waitress. Me our my cousin would pay you 3,000 bells for every time someone comes over. But if that was the case then the prices for her cafe would have to go up. If this job sounds fun to you, you can apply here:
Job Application
Ask her for a job in the topic. As you can see Jason got denied for this job. Be super nice and discuss which days and hours you can work, and she might approve.