I found this Youtube Channel from DBA Kendra Little.
SQL Workbooks - https://www.youtube.com/channel/UCrJ8WLrVoKxL94mKv2akxTA
There's a lot of very rich and good information about SQL Server.
She also talks about career and other stuff, like this one:
How Does a DBA Build Confidence After Making Mistakes?
https://www.youtube.com/watch?v=aKQWoNJ3jPw
You'll find it very helpful !
Her Twitter handle: @Kendra_Little
Greetings!
