What wp theme would work for this site?

Hi Guys,

I am setting up a new website called myfreelessons.com which will function as a portal for listing all different types of free lessons in all different types of categories, starting small and growing as the community expands and social sharing increases.

I have had some professional written courses created for learning guitar, and a whole host of lessons written for the marketing world, the focus isn't on any type of lessons, just on the fact that they are free.

The incentive for people to list will be the link back to their websites or other, where they can hope to sell a product due to the awesome free value the customer received from their myfreelesson.com/listing.

There is scope to build on this further....but for now I just want to find out If there is a wordpress theme that anyone knows about that would fit this function of requirements....people would need to be able to list a lesson, video, text, html etc included.

It would be a site where you have to register as a member (for free) to gain access to all the free lessons...this way I capture their email address, and can somehow monitor their activity on the site, so to potentially further break down their interests and apply to targeted future campaigns as a result of activity feedback.

Does that make sense?

Any suggestions most welcomed.

Cheers

Mike