This site usually focuses on intermediate to advanced workflows and topics, but here I just wanted to mention a couple of getting started resources that you may find useful. There is a new and comprehensive video playlist on the BIMscape channel, and I have embedded it here:
And don’t forget about the Autodesk Design Academy. For example, the link below will take you to a Revit and Architecture Fundamentals online training course. All for free, of course.
https://academy.autodesk.com/curriculum/fundamentals-architecture
