Hi! I got into LaGuardia a while ago and I'm a soprano-alto. I reccomend show songs such as if I loved you from carousel, the beauty is from the light in the piazza, memory from cats, or any christine song from phantom of the opera. Good luck!
The world is called Pandora.
If there were no copyright laws, you would not be able to protect your music after releasing it. People could take parts, or even your entire song and claim it as their own, and you would have no legal bounds or actions against the plagiarism of your work.