Do one thing at a time. I’m assuming “ect” is an exam for college. Regardless, sign up for an in-person prep course, supplemented with tutoring if you need it. That is your highest priority and your most time sensitive task right now. Find where you can take a professional grade Strong Campbell Interest Inventory test. It may now be called the “Strong Interest Inventory”. You answer a million questions, from your answers they assign a code to your personality, and they show you a list of fields that people like you enjoy. Sign up for classes in those subjects, knowing they will get a lot harder after the first 1 – 2 semesters. Make choices out of the list you will get for lucrative fields. I took that test a lifetime ago. I kept the results. Everything it said about me turned out to be true. Many university counseling centers offer the professional grade exams. If you can’t find one now, take electives in your first semester and take that exam on your campus.