Quão "difícil" é modificar/estender o Discourse para um desenvolvedor backend

[RGJ (Richard - Communiteq)]

Yes, there is quite a large learning curve. But all the things you mention already exist and no coding will be needed.

@BSODjunkie

• Certain categories being hidden unless user is logged in
• Sign ups needing to be admin approved

are in core Discourse, and

@BSODjunkie

• Filter posts by multiple tags in an easy way
• Photo carousel at the top of the site potentially

can be done with existing theme components.