Grad. Project Ideas

My cousin Steven already graduated and he finished his graduation project but I don't know what he did. Before the first class of Grad. Profect I asked my friends what kind of stuff happens in the class. They told me that I need to pick a topic for the project. My mother and I have been talking about what I would want to do and I decided that I wanted to create my own song on the piano. Creating my own song on the piano would be a great thing to do because I never did that. Some of my concerns for this graduation project is that making a song on the piano is going to be hard, I dont know how to make a new song.