Selling a membership and documents, separately or together

Hey all,

I can't quite get how to do it all , but it must be possible with Fluent everything.

I sell language learning materials with access to communities included in each purchase. Ideally, it would be possible to upload a file (not video or image) in specific subgroups/communities.

Customers would be able to purchase a digital product with limited membership access or a membership with all docs.

There are membership plug-ins that do that, but as a fluent fan told me, fluent code is light!

I use already fluent forms, boards and crm.

Anyone have any how-to leads? Thank you