Focus on your schoolwork for going to college; that is the most important thing you can do, and will have the most impact on your applications.
You’re 5’4" and you’ve never rowed before and you’re in 10th grade; you simply do not have a realistic pathway to be recruited as a rower. The odds would be similar to you starting basketball now and thinking you could become a recruited athlete as a power forward or center; no matter how much you may want it, you would not have the height and abilities required to excel in those roles.
Join crew for fun, exercise, and community, and focus on what you can pragmatically change to make your application stronger (your schoolwork) and direct your energies there if your goal is more highly selective/rejective colleges.