Migrating my guitar lessons site to drupal - advice on organization?

Hi,

A while back I created a guitar lessons site using PostNuke. I have since learned joomla and built a site for an international organization that had me pushing joomla to its limits to achieve the sort of content organization I wanted. I find myself revisiting my guitar site, which I unfortunately allowed to sit for several years, with no updating. Since I like learning new skills, I thought I would revamp my site and implement it as a drupal site. Here is how I would ideally organize it.

- Categories: there would be categories like scales, chords, and each could have subcategories
- Within categories there would be lessons. Lessons are a self contained unit, which can stand on their own simply as an article, or they can contain one or more exercises, which would include images, audio, video. So, the exercise will be a crucial content type.
- Lessons and exercises would both be searchable
- In additional to being in a category, lessons and exercises are to be tagged, so that when viewing a lesson or exercise, one sees a list of related lessons/exercises. Alternatively, lessons/exercises could be assigned to multiple categories.
- Anonymous users can view lessons/exercises, but have to be logged in the hear audio and see video. Free account will have limited amount of audio/video. Paid accounts have access to everything.

These are the basic requirements. Does this all sound readily doable in drupal or is joomla really a better fit? And tips before I begin? I am really not familiar with how drupal uses taxonomies/vocabularies, and it seems this will be a crucial part of setting up the site as described.

Thanks!