@PieInYourFace,
Then it's high time you got some experience.
Fast food will hire nearly anyone, long as you aren't disabled enough that you can't do the work, and you don't have a criminal past. Do it for a while and learn what it's like to essentially punch a clock. You also learn responsibility, because people count on you to come in on time and do your job. It will also help you to learn how to budget your money, as fast food workers aren't paid that well. Smart folks get promoted, and often quickly. I dated a guy who became a manager before he was 23.
Having this sort of experience will put something on your resume. It will also, most likely, teach you what you
do not want to do with your life.
Or there are other starter jobs out there, from file clerk to gofer to mowing lawns or cleaning up at a beauty salon.
Do this for maybe a year, and you'll see college with different eyes. I would also advise considering where you got the most pleasure in high school, whether it was math class or running track or art. Many of these activities can be made into a college major and maybe even a career.
Also, understand that what you really want to do might be hard to pin down because it hasn't been invented yet. I graduated high school in 1979, long before the internet was a thing. I make my living (and I greatly enjoy this) as a freelance writer. I blog and I write landing pages. This profession did not exist 38 years ago when I graduated.
And one more thing - it's pretty close to impossible, at age 18, to know what will make you happy for the rest of your life. So take the time to consider what you like now but in a somewhat general fashion. Hence if you like biology, then consider science as it's more generalized. This will make it a little easier if you have something of a focus but not a perfect one. Not knowing what you want to do is pretty damned normal.