How would you approach this "I'm not doing anything with my life" problem?

I'm 17 going on 18. I'm at the end of high school. I'm a pretty bright kid. I take advanced classes and I'm not a procrastinator at all. <br><br>I feel like I've accomplished nothing in my life and I'm about to turn 18. I haven't done anything impressive in any way. I've had no truly great experiences. I've never accomplished anything big. I feel like I've been drifting straight forward my entire life, with no idea of what is ahead. I don't feel like I've learned much about the world, I don't have a career path in mind, and I don't really know how to properly interact with adults, or even people my own age. I also don't have much motivation to put myself out there and try new things. I have a little bit, but it isn't enough to actually change anything.<br><br>I feel like I'm in a rut that I can't get out of, and I've been in it for as long as I can remember, and I don't want to be in this rut anymore.<br><br>How would you approach this "I'm not doing anything with my life" problem?<br><br>What did you do when you felt like you were in this situation?<br><br>How did you get the motivation to get out of it?<br><br>&#x200B;