If you are doing this inquiry as part of a class or group, share your report/presentation with others in that setting. Also set aside some group/class time to discuss everyone's experience with designing inquiry questions. Did everyone have at least one question in each category? In what ways do people's categories of questions look the same or different? Did the inquiries follow roughly the same course?
If you do not have a formal setting for sharing this inquiry, consider how you might get some feedback on it. Can you adapt the report or presentation to be appropriate for some other class assignment? Can you discuss it with a music teacher, or share what you learned in a conversation with a friend who has similar interests in music?