How do I pick a career?

As most others have said, 10th grade is too early to pick a career for most people. You could begin to have ideas by that age, but certainly not anything definite. For example, if you like to write, you could begin exploring careers in editing, journalism, or related fields.

I know this is a requirement of your school, so you have to give this the necessary attention. But don't consider it something that you won't be able to change when you grow up.

The most important thing about any career that you might go into is that it be something you will like to do and enjoy working at. And it is very hard to know what that will be at your age now.

You don't lol

I thought I was going to be a solider, after I left the Army, I thought I was gonna be a cop

...I am now studying nursing. Life is funny like that

Maybe start by thinking of the jobs that you wouldn't want to do. That might narrow things down a bit.

Don't you have interests or something?

go with what will pay and where there is a great need so that you will always be employed

Research, the internet, role models. There are amny resources for answering this.

It'll come to you.
Way too early yet.

Based on your hobby