I messed up the first semester of freshman year?

You still have three more years (assuming 4 year degree) to improve your GPA. You're kind of expected to not do so hot your first year anyway, so really one C on your record won't hurt you that much in the long run.

If you can drop that choir thing (elective?) then replace it with something that plays to your strengths. You may want to think about dropping one of your activities to give yourself more time to study.

However, if you're thinking about a highly competitive university, they are used to seeing students with perfect grades so they will be more focused on what else you've been doing.

I would also advise you to focus on making good friends with as many people in your activities as you can, and to also work hard during your time at these various outside activities with an eye toward impressing whoever supervises/runs them. This network is your best bet for getting an edge into one of your top schools. They may know someone at one of your choice schools and be willing to put in a good word for you, or even help you to get accepted.

Too many activities. Focus on your grades to bring up your GPA. That looks better than having a dozen club memberships (which takes away your time to study.)

You're not being realistic about your college choices.