how do I keep up?

okay so I'm the president of my class so that keeps me busy, and I volunteer a lot, but I'm also a freshman in high school. And right now I don't know how to balance everything because I need to workout but I can't find anytime with homework and planning homecoming etc. can you guys give me advice?? (Yes I know this isn't the right topic but I figured it's probably one of the most visited)