I fully agree with Mad’s suggestion of the Ashley Kennedy course on LinkedIn Learning.
I learned Premiere back in the late 1990s from self teaching and CD based tutorials of the day, but I took a 10 year detour to FCP 7, and when I returned to Premiere a few years ago I found that I needed to refresh my memory, and I spend a couple of days taking her class – I learned so much.
Because of changes with new releases and the fact that I really use the tip of the iceberg in most apps, I’ll probably take her most recent class this winter to refresh my knowledge. I’m also using Resolve, and this is what I expect to be my main editing app down the line.