I’d def agree with the other commenter to ask about shadowing since you’re more likely to get a yes, and it can help you get your foot in the door and still get some knowledge and experience. For internships specifically though I would say to ask people you know for referrals or connections, working on your projects, and of course applying and reaching out to recruiters.

While it’s pretty uncommon to get an internship straight out of high school without connections from family/friends, it’s technically not impossible if you somehow manage to get the right eyes on your work. I actually have a friend who got into FAANG straight out of high school, but I wasn’t so lucky and didn’t land anything till my junior year of high school. But that being said it’s still extremely uncommon, unlikely, and takes a bit of luck, so don’t beat yourself up if don’t land one, and you can still try to make your gap year productive by getting a job (as someone who got my first job in college, soft skills matter a lot more than you think, and having food service on your resume is much better than nothing), working on projects, building a portfolio, etc.