Ive learned with youtube and would recommend the following channel:
The WP Guru: https://www.youtube.com/@WPguru
Rauko: https://www.youtube.com/@RaukoDaz3D
Game Developer Training: https://www.youtube.com/@GameDeveloperTraining
There also used to be a guy named IT Roy but his channel got deleted(?)
Be carefull tho as not everyone is making quality tutorials. Parmy Baddhan's video are usually ok but some of them contain false information. Avoid NotFrom ThisWorld as hes making videos only to promote his stuff and he dosnt know how to use Daz properly. For exemple in one of his video, hes teaching a method that take 20 minutes with gimp to achieve a result that take 10 sec with the geometry editor.