I too would strongly recommend David's book.
If you want to check out good YT channels I recommend:
Why Logic Pro Rules
Music Tech Help Guy
Jono Buchanan Music
Needless to say, I don't have any affiliations with any of these. I find Jono especially good for beginners to intermediate levels. Each video is relatively short and covers a single topic so just look through the list and find a topic that you're interested in.
HTH,
Alan.