I hope that you guys can give me some tips to accomplish that.
Welcome from out in central PA.
A lot of great wisdom in the posts above. First thing is first, if you don't get in debt in the first place you won't ever have to pay off debt. Besides the links above I'd also look at some of Dave Ramsey's items on how to get out of debt (if you have any) and also on how to save money and details on an emergency fund. Also create and live by a budget. Lots of free info and templates out there on that and as others have said, the first person you pay is yourself. Look at your self as the most demanding creditor and every check money goes into your savings 5 preferably 10%. After you pay yourself the rest is to live on. Same goes anytime you get a raise, put the extra to your savings. Want to retire by 35, save now.
Also as I believe I saw others mention, invest in hard goods. Not just precious metals but things like firearms, tools, property. Don't become a hoarder but having quality tools is a great investment, as they say "buy once, cry once'; meaning buy quality items the first time. Yes it'll be costly and take you longer to acquire things but many might last your lifetime. So whether that's a broad fork for your garden or a set of mechanics tools quality beats cheap. And just because something is expensive or has a fancy name on it doesn't mean it's quality. Learn to evaluate things for their quality and actual value. Don't be the person to buy a $10,000 dollar tool chest when a good quality one for $700 will likely get passed to your children if you care for it. Same goes for clothes, the $175 dollar pair of designer jeans likley won't hold up to the first dozen washings where as a pair of $40 ones from the farm store might last years.
Other investments include savings but don't just toss it into a savings account at the bank. Consider taking some of your savings say once every month or two and go buy some silver coins. not collector coins, junk silver, bars circulated coins. only 5-10% of your net wealth. Stuff it in an ammo can and only you and yourself knows it's there. Money in the bank can disappear tomorrow if the govt decides it wants it or they decide to call a bank holiday.
Buy things you'll use, preps, food storage etc...
You mentioned taking a class for business. Good but be careful, if you're going to school thinking you'll learn how to run a business, that isn't it. Make sure it isn't something you can learn for free by doing it. Ever notice how many business owners don't have a college degree much less one in business? You want to learn about business, go to work for an entrepreneur. If you're going to school make sure it's a field in demand. Engineering yes - business no, Automation design - yes - gender studies NO. Consider things like tech school - plumbing, electrical, machinist welding or look at internships at farms.
How many jobs are you working? If your 18 and your not working at least one job full time and another side gig or two, get your butt in gear. Drive is in big demand. Show people your smart, competent, trustworthy, reliable and hungry and you'll go far. Even if you're in school get a job and make so cash to save if not to start paying your school loans now.
The internet is full of all sorts of info. go find it, read it and then try it. things sound easy in a book until you have to deal with the real world. At 18 you should try and fail at things frequently, the more you fail the more you learn.