If you feel lost, build something.
A business. Your body. A skill set. Anything that gives you a reason to learn and focus.
Don't worry about choosing the right thing. Don't think about how difficult it will be.
Just start moving forward and you'll find a path that feels right
At some point, usually in your 20s, you'll notice that the people around you stop believing in themselves. And no matter how hard you try, you can't save them. By all means, do not let it infect your mind. Stay on your path.