High school exists for only one reason: teach you how to be a college student. So, from me to you here is what I would tell you.

At this point in your life the consequences of trying things is lower than it will ever be again. Take advantage of that. Does something look interesting to you? Find someone who does that and ask if you can shadow them for a day. Read weird books. Read classic books. Stop watching television; TV exists to make you feel like a piece of garbage so that you buy stuff you don't need or want to feel better. Television exists to turn you into a consumer potato; it's brain cancer.

Get healthy. It is so SO much easier to stay healthy than to get healthy, and if you don't believe me on that just look at all the idiots like me who are dealing with the consequences of poor health choices in our 20's. As a teenager, being healthy should be your main job. Being healthy also has an added side effect of boosting confidence. It also has the benefit of opening doors; if you can run a half marathon people will want to talk to you about that, etc.

Your experience of the world is infinitely small. Understand what that means for a second. You know what your family does and how they think. As you expand your experiences, you bend the trajectory of your life. Your school will push you to go to college, that is their job after all, but is that the direction you want or need to go? Ask yourself in a year if you really want to go that route: If you decide to be an engineer, doctor, lawyer, accountant, teacher you will need to go to college and figure out how to pay for it. I've said this before elsewhere, but there is a difference between passion and talent. Is there something that you do with no effort, something that other people say "wow you are so good at that!"? That may be your talent. Use your talents to fuel your passions, UNLESS your passion IS your talent.

Otherwise, find a trade that is in demand in your area, go find the union hall and work on getting your journeyman's badges. Shadow people for a day, most union halls have an observer program of some sort. Find a trade that calls to you an do it. You will work you ass off for 4-5 years, come out of it with low/zero debt and contacts in your new field. Things like Welder, electrician, pipe fitter, carpenter, mechanic, machinist will not be outsourced. If you like computers, find out how they work. How does code work? How are they put together? Most of this stuff is online and you can get as good as the effort you put into it without a college degree, and if you have a git repository that you can use as a resume, tech companies hire talent not degrees. This is something that sadly we cannot help you with... Only you can answer the question of "what are you good at?"

And this is going to fly in the face of a lot of advice out there, but as a young person, don't buy a house until you are where you need to be. When you are young, stay mobile. It is easier to get out of an apartment to take that dream job on the other side of the country than it is to get rid of a house to do the same. mobility when you are young can lead to opportunities that may not otherwise come your way. (A friend of mine, at 50, is an underwater welder who has never owned a house, makes 200K+ a year and spends half the year on a beach somewhere because his talent for building stuff fuels his passion for scuba diving. His next job can be anywhere in the world, he is in Chile now.)

If you are 19 and still have not a damn clue what to do with your life, think about the military. Its not for everyone but there is a GI Bill, travel, a job, experience, and there are whole industries that only hire veterans.

Finally, spend less than you make. WATCH THIS VIDEO NOW. Every dollar that you save now when you are young, through the magic of compound interest, can turn into thousands of dollars when it starts to come time to retire in a million years. Good health and cash in the bank that you can fall back on makes you more mobile, gives you a feeling of security your peers won't have, and gives you the confidence to take risks. You and your parents can put money into a 401k retirement plan up to your income, so if you make 10K this year and your parents match your contributions, you can put up to 10K into the fund. And having 6 months take home pay in the bank is freedom. Got that job across country and need to go NOW to get it? it cost money to move. get hurt? Unemployed? with a cash buffer, you have a bit less stress on making your next move. And keeping a cash buffer forces you to plan ahead and think a few steps out which is always a good skill to have.