I'm going to agree with Jawor. You have to find out what you're passionate about.
A few ways to find your passion:
First - What activity or thing that when you do it, time flies? Whatever that is, your passion isn't far from it.
Second - Try out a ton of stuff. You're young, this is the perfect time to experiment. Instead of focusing on being productive, find out what you want to be productive doing. That could be playing an instrument, being a tour guide, travel, nature, doctor, artist, building, cooking, etc. Find out what you're both naturally good at and also enjoy doing. That's what you should be focusing on, and it'll come easier because you enjoy it; however, it'll still be work. My best example of that is a teacher, a teacher loves teaching, but doesn't like grading papers, so they put up with grading so they can do what they love, teaching.
Third - Google search videos about finding your passion. There are tons of them out there. I personally love designing and building tiny houses. It forces me to be creative with small spaces. In the end I get a physical item that I can say, "I made that." I also love living simply and this not only helps me live simply but helps others live simply. Helping others, or giving, along with building relationships are two of the more important things to do to live a happy life.
I think the best thing you can do is find out what you love, and then pursue it. Don't do it because it'll make you money, do it because you enjoy it. Worry about the money later. A good thing to do is reward yourself. Starting small makes things easier to, so maybe you spend 1 day a week trying new things, then reward yourself afterward, like playing video games and not feeling guilty about it, because you were successful that week as trying something new.
Good luck! TL:DR Find out what you're passionate about, and then pursue it.