Three careers/jobs I can see myself doing after high school can be:
I have always wanted to be a nurse. I love biology and the study of humans. A nurse is one dream job I want to go for.
Designing things is also one of my favorites. I think I am very creative, and being an architect is cool.
I want to be a senator. Senators have been one of my favorite jobs. I want to be a government offical. Being a senator means a lot to me.
Hope this helps you!