Reapplicat or 10th?

I’m in 8th grade and applying for 9th. I have an older sister who is in her freshman year of college. She said she couldn’t imagine spending another year in high school, by the end you REALLY are ready to move on. I’m excited about BS, but I don’t think I would like being 19 and still having to have checkins and things all and not be getting on with my life. I don’t know. Obviously I’m young and have not experienced it yet, but I feel like in 4 years, I definitely want to be in college.