I know the future can seem scary. It's a completely normal and ok feeling to have! When I was your age I had absolutely zero idea who I was or what I wanted to do with myself. It seemed like everyone expected me to have some big plan for what I wanted to do. But here's the good news: you don't have to figure it out right now!
I would encourage you to take some time for yourself and figure out what you like. The very best way to do this, in my opinion, is to just spend a lot of time thinking about it. When I was around your age I really liked to do personality tests and answer "20 questions" type lists. (You do not have to do this, but I had fun with it.) You can take up some new hobbies or go back to some old ones. Along those lines, you can look into joining a club or organization, whether that be at your school or in your community.
My other suggestion is to think about the kind of person you want to be, and the kind of life you want to have. You can ask yourself questions like "What kind of place do I want to live? What kind of people do I want to be around? Do I want to get married/have a family?" Those sorts of questions might help you start to generate some ideas for what your future will be like... and you can figure out the details sometime in that future.
Things might seem scary right now but you can get through it! You have plenty of time ahead of you to learn about yourself, and I would say that's much more important than having a big plan for the future.
