I am well underway with converting my website to drupal. The site contains guitar lessons. All content has been imported into drupal. I have lesson and exercise content types. A lesson can contain several exercises, and exercises can contain audio for instance. The way I set it up, I created custom filed for audio. But maybe audio should be content type and then I would use Entity Reference to link audio with exercises, much as I link exercises to lessons?
Now that I have been learning about page manager and selection rules, etc, I am trying to figure out if my chosen structure will support the behaviors I need. For instance, I want to make it so that listening to audio requires a visitor be registered - so in exercise panel/pane non-registered user would see a play audio button that would redirect them to a registration page. Registered users would see the embedded audio player. Right now audio is displayed as a regular field but I am thinking maybe this will cause problems later.
Based on above, can I accomplish what I need as I have it set up now, or do I need to organize/think differently? How would you organize?