For your paragraph I would include how you would study hard and do extra credit work to up your grades.
Next, I would say that you would get involved in extracurriculars that would improve yours skills for your future career.
Then, I would add a job that you would do that would also improve your skills while also saving up money for college.
Finally, for the tests, I would say that you would take AP classes and the tests. Also, try to complete as many optional tests as possible.
Hope this helped!