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I’m with you on Amatrol, they make some nice (but expensive) trainers. Their curriculum is not great, but they kind of have a captive audience, almost a monopoly in tech schools.
What you are describing for the contacts of specific components is an electrical “take off”, since different countries and companies draw things different ways, understanding the diagrams and schematics is the key. I do this all the time unconsciously now, I’ve just seen a lot of drawings over 40 years or so. Maybe collecting a bunch of examples and explaining how they work (after covering electrical basics) would be good. The jump from European/German to US to Japanese drawings can be disconcerting.