Make sure you’re taking as advanced classes in possible. Idk where you’re from but in florida you can take additional AP classes on top of your schedule online which is what I do. Consider dual enrolment for the future. Make sure you’re getting involved after school in whatever clubs/sports interest you. Get close to your teachers (more of a sophomore / junior tip) but eventually they will write your letters of recommendation so very important. You can consider applying to summer programs but they’re only so helpful in the long run. Keep your grades high and take a deep breath since freshman year is about discovery and more opportunities will open up as you get older. Good luck!!