You don't need any work experience or anything, just look at the basic situation, because part-time jobs are mainly aimed at students at school.
Just follow the normal resume mode. Write down your name, age, school, major, current address and date of admission.
Then write down your available working hours below. Write more about this suggestion. If it is only a few restrictions, it will be unfavorable to your application and not competitive.
Finally, you can have a personal evaluation, such as the degree of effort, academic performance, participation in community activities and so on. Let it play freely.
Three parts are enough. If you like, you can write down your hopes below, such as very much hoping to join the world's top 500, hoping to get this opportunity and so on.
I know the format. Paper is ordinary A4 paper. It doesn't matter whether it is printed or handwritten. Just write it clearly.
You can put it in an envelope or you can write it on a piece of paper. No problem.
Remember to leave your contact information on your resume and keep it open!
I wish you a successful application!