Put on the hat "Microsoft Dynamics 365 for Customer Engagement" and the dimensions explode. There are so many different angles to think about such as 

• The Product
• The CRM Industry
• The Independent Software Vendors (ISVs) and their extensions, applications and products
• The Project Methodologies
• The Communities
• The Support Resources
• The Training Options
• Certifications
• Industry Uses
• Usability and Adoption 
• Integrations
• Mobility
• IoT
• CRM -> ERP : Bridging the teams, the products, the features and more
• Failures and the Why behind them 
• Working with the Microsoft teams (product, support, services, executives, sales, etc.)

and the list goes on! 

I recently completed a Solution Architecture Assessment engagement and was amazed at all of the categories of discussion and knowledge sharing that bubbled out of a three month, intense, team empowerment project.

So where to start??