This is a really complex question.
For finding what career is right for you, I recommend career testing and counseling. The tests will take inventory of your interests, values, and what you absolutely wouldn't want to do. This tells the counselor a lot about your personality, your work ethic, your overall motivation, and other important areas that contribute to career fit.
Most universities offer career services, but if you are not a part of a university or if your university doesn't offer that, you can take career tests online. The "Golden Standard" as much as I hat that phrase, is the Holland test or RIASEC test. This test gives you a three letter score that can be used to search online for jobs matching that code. This is a great way to see what areas you would be fit for based on your interests, values, and what you could and couldn't see yourself doing. This is what i would recommend. A real Holland test is expensive, however there are many free versions online. I have found them to be not quite as accurate, but for free they are ok. Ideally you would get a test and counseled by a licensed counselor or psychologist.
You can also look into local counselors that offer career counseling. Many counseling centers or mental health units offer these services, and it would be well worth the money, especially if you have your Holland code when you go.
After that, you should be prepared to research the areas that they highlight for you and spend time thinking about each one. Many times, there is something on the list that you have already thought about doing, I recommend choosing that one to research first, as it was already a possible choice for you.
Ultimately though, no test or counseling will ever replace getting out there and learning what you love to do. Years ago I wanted to be a counselor, on the front line, dealing with severe mental illness and surrounded by patients. Years of actually working with patients has shown me that I do not belong doing that, I belong training counselors and teaching people about mental illness. This is something that a test wouldn't have told me about myself. So ultimately, do not be afraid to jump in and experience something, you just might fall in love with it! Just remember not to settle for a career because you think that is all you can do, everyone has the potential to do what they want to do, you just have to make it happen.