How to work with INSET FACES | Blender 2.82 | Tutorial - YouTube
The inset faces command is well-known with 3D modelers, but did you know these extra shortcuts? Follow Blender Secrets on Youtube... | By Blender Secrets | Facebook
Round Inset (blender addon)
mesh - How do I Inset a face equally? - Blender Stack Exchange
Inset a face except for the bottom bit - CG Cookie