Like handing out flyers, 50/day, answering the phone, 50/day, you can also look at KFC, M, Pizza Hut, etc., some of the bakery's job announcements, usually waiters or cashiers

Because you're 18 years old and a high school senior, you're more likely to work in the service industry than in the technical field.

If you're a boy, you have a wider choice.

Also be prepared to answer some basic questions during the interview. And a basic resume.

Be safe, and if the company or organization lets you sign a contract, get a professional such as a lawyer to look at it for you first.

It is also expected that you will be able to oh properly add some just to upgrade yourself. For example, accounting, computers and so on. So that in the future good to find technical work