Hello!
My process for desiring my topic was very simple. I started by writing down the things that I love to do and watch. Then I looked at the list and crossed off the things that would be harder to research and had few questions to ask and research on. Finally I looked at the remaining options and chose the one that I wanted to research the most. So I decided on music!
To decide on my question I thought beneath the surface of the topic and dug deeper until I came up with the idea of effects. After I came up with the idea I thought of some questions I could ask about the effects of music on our bodies and lives. I then narrowed down the questions and combined some to make the questions more sophisticated. After that I wrote them down in my proposal and worded them differently. That is how I came up with my sub and main questions about music.
That sounds like a smart process! Your topic sounds very interesting!
Thank you for the nice comment!