Some advice from a mother of a kid who had a good success rate with admission (out of 6 applications to highly selective places, 4 acceptances, one waitlist, and one rejection - Harvard).
Be very organized. If your parents are willing to help you watch requirements and deadlines, let them.
Don’t think of any college as your dream school. Instead, think of what you like to do in college (areas of study, major, ECs) and search for schools that provide it at a good level. If you are very advanced in one area, look for colleges with a top ranked program in that area.
Once you identified schools that will be good for you based on your interests, think how you can convince them that you would be good for them. Think why you would be a good fit and why they would want you. What is special about you? Find out what kinds of students they prefer. Make sure your application reflects all of the above. Essays are important, but you don’t have to be a very good writer. My son isn’t. Most important is that whatever you write, you tell about yourself. Through any topic you can convey what kind of person you are. Of course, your personality has to match their preferences. And that’s why it’s so important to find schools that are a good match for you.
College visits are not necessary and costly, unless they are close by. You can find out most that you need online.
Be sure you can afford to go to the school you spent $60-$90 on the application.
Apply EA, ED, SCEA - and be ready to submit more applications by Jan 1st. If you got into a good school early, don’t waste money and time to submit 10 more applications. Only do those for a reason: better program in your major, financial aid, location (unless you were admitted ED in which case you are done).
Practice for PSAT. Ultimately, NMF not necessary to get admitted to top colleges, but you can get a scholarship.
And of course, take the most challenging classes you can handle. Dual-enroll at a local university/community college if possible. Stick to 2-3 ECs, and try to show leadership. Do things you enjoy and I don’t mean video games.
That’s all I can think of at this late hour.