Would an explainer video be a good way to teach people these concepts? For example, put in a strong player to play the Aeon campaign #2, and just explain EEEEVVERYTHING he's doing, including things like taking reclaim. And intentionally be slow about giving orders, don't try to have epic APM. Move at a glacial pace so the viewers can understand what is happening and so they know high APM is not essential to playing the game. They don't have to play on the hardest difficulty. The point isn't to show off skills or hyper-efficient builds, it's to explain every little detail like reclaim and HQs and why they are making mobile AA. A single video showing the first 10-20 minutes of the campaign mission could convey a lot of info. Best to keep it short rather than showing an entire 30- or 60-minute mission.
This could be in the format of just 1 person talking, or it could be in a question-answer format where there is an interviewer asking the player what he's doing and why. I like the idea of using Aeon mission 2 for this because it sets up the video to end basically with a challenge: "now you try it" because people like to copy streamers