If you read nothing else about NSX-T after a NSX-T 3.0 course I recommend you read / view the following:
VMware NSX-T Data Center: What’s New [V3.1] online self-paced class.
From VMware Customer Connect Learning (need to register but basic subscription is free):
NSX-T Reference Design guide V3 x (published in December 2020)
This is a “must read” – not just design but also architecture, operations and performance.
NSX-T Edge – single N-VDS Multi-TEP design
Great guide to this config here – the latest ideas about configuring Edge Nodes:
Good KB on NSX-T and VDS: