Ruth MacGregor has a great video for hand carding. This is closer to how I do it
The one thing you'll learn about the fiber arts is there is absolutely no one way to do anything!!
What works for baby southdown may or may not work for lincoln longwool, alpaca, merino, romney, buffalo, cotton, etc etc etc
There are many, many, many ways to get to the same goal. We all find what works best for us using the fiber we're working with.
This video shows what I was trying to describe in my last comment about removing the fiber from the bottom card.
I don't like the way this lady handles her cards ... too rough in my opinion, but hey! I'm not the one that will have to replace her hand cards when the teeth get bent.