So Charles Cleyn, a popular Logic Pro tutorialist, has put out a large number of Garageband tutorials in the last year that are really well done!
https://www.youtube.com/@CharlesCleyn/videos
This would be a good one on the basics;
If you want to try out the midi controllers in the lab this will get you going;
The only thing that may be lacking in Charles's offerings is a quick video dedicated to pro-level mastering in Garageband. This one by Colin Cross would get my recommendation;
