I like the videos by David Casler on YouTube. He has many. The videos for the Technician class license may be of interest to you. You might also want to check

I like the videos by David Casler on YouTube. He has many. The videos for the Technician class license may be of interest to you. You might also want to check out the American Radio Relay League, at arrl.org. Wishing you success with your investigation.