18 years old and need a part time job

So I (18M) live in outer Sydney (northern beaches) and have just finished the HSC.

My grades were very good so I have ground to stand on for maths tutoring. However I have never worked a part time job before nor done any volunteering, so it feels I have no real competitive advantage when it comes to applying for jobs in retail, cafes, etc (which ideally I want to do alongside tutoring). And also I have absolutely no idea what to put on my resume lol.

Just feeling a bit stuck/lost atm. Thanks in advance.