Colleges generally have no idea what any student's AP scores are unless and until they are submitted (generally after the student is admitted & selects his/her U). If you want to take any APs, you will have to find a HS that will administer the AP for you--you can start by checking with the HS you attend to see if the registrar will order it & someone can administer it for you. There is a charge for each test you register for & take as well. If you score well, some Us will give you college credit for your test(s) and MAY exempt you from retaking the course.
This won't really boost your stats and results will come out in June or later, well after your Us have accepted or declined your apps.