@Elminster I can't help but notice that activity in all of these "call to action" threads have died down. Setting up teaching runs is not a "shout once into the void then walk away and see what happens" type of deal. Especially when it's primarily done on a forums, and also especially when the person doing it is not known for raiding.
I hope - if you're serious about this - that you follow up and put in the leg work to actually make these happen.
Set a date, and be punctual regarding it. Have a plan. Which raid(s) are being run on that date, and what is the plan if there isn't a full group (many can still be run and taught without a full group assuming the teacher/leader is knowledgeable and well built character wise). Communicate expectations clearly (both in game and in he forum posts that are used to set these up). This can include reminding people that failure is possible, as the purpose to education (sometimes you have to experience an auto-fail mechanic for it to click how important some tasks actually are), and don't freak out if things don't run perfectly smooth (and hopefully the leader and maybe the few vets who are helping are able to facilitate recoveries when things do go south).
But just throwing an idea into the wind without following it up is a recipe for failure (not of the in game runs, but of the idea itself). It's self sabotage. Follow up with action, not just more hype posts (all caps with lots of exclamation points and word salad is very corporate manager talking themselves up, but it goes nowhere and does nothing without people actually doing things behind the scenes).
Or was the purpose to have a leader/teacher step up and take over the organizing/planning and all of the doing? If so, that should be communicated as well so that they know it's now their responsibility.
(or is all organization now happening elsewhere, in game or a discord server. if so, great, and good luck to everyone involved!)