Have an Answer?
You are still young, but you still should have an idea of what things you enjoy doing and what you do not enjoy doing. Think about the things you enjoy doing, write them down and maybe do some internet research on them. This way, you can gain some knowledge and see if this is something you would enjoy doing in the long-run. You can also find older people that you admire and talk with them, especially if they are in a career that you think you would like. But, don't fret if you change your mind. Life is all about change and choices, so it's okay to be doing something now and then change it 10-years from now.
High school is a very turbulent time in a young person's life for many reasons. You are currently in an age of exploration and discovery, so don't worry much about being uncertain of your career future. Many high school students don't have a clear idea about this during their four years of secondary education, and that is totally fine! Heck, many people don't even BEGIN to figure out what they want until they are halfway through college (take that from someone who has been connected to college life and students in various capacities for the last 16 years).
That aside, there are some things you can do right now to help you begin to form an idea of careers that might interest you down the road. Does your school offer any kind of career guidance or have career days? If so, those are two excellent resources for gaining information. If those aren't available, talk with your guidance counselor about career coaching and ask if you can be referred to someone who specializes in adolescent career development. Consider job shadowing, too, in which you can accompany someone to work and see what they do.
Whatever you decide to do, though, stay focused on your schoolwork for now. Do well, study hard, ace your exams, and keep an open mind.
Hope this helps.
Cheers and regards,