ListView to Fragment or ListView to new Activity?

Now I'm creating an app for music scores, and first, the list of songs is ListView and appears as TextView.

I am still a beginner in programming and Android Studio, but I would like to see the score of the song when setOnItemClickListener().
However, should I move to another Fragment or create a completely new Activity?

I want you to go back to ListView when you enter the score and press the Back button, but if you reach 50 songs, why don't you make so many Activity?

I'm sorry I'm a beginner, but I appreciate your cooperation (^_^)