https://www.darktable.org/usermanual/3.6/en/guides-tutorials/other-resources/
In addition (pick your level and presenter) for a range of content and presenter style check out these…
Frank Walsh
https://www.youtube.com/c/FrankWalsh/videos
Stefano
https://www.youtube.com/user/MEL365com/videos
Hal
https://www.youtube.com/channel/UC8CZCvZL3ic2hg074Quh2oA/videos
Nicolas
https://www.youtube.com/channel/UCxHYygok15XQ6bqu9FK-oCw/videos
Hardcore explanations …well worth looking at once you master some basics…
https://www.youtube.com/c/AurélienPIERREPhoto/videos