Yeah I didn't go into that extra headscratcing in my post as my daughter can get the Edu discount. Wasn't sure I can really use it for myself. I assumed Apple check when you register the machine? If you haven't seen it have a look at EduStore in the UK. They only do edu disconts obut have base 2020 MBA currently £816. That would be a no brainer I guess but same issue about me using it for myself. Maybe I'm just being too honest!!
Here in the States I've been able to order from my old university campus store and get the EDU discount - they (campus store) specifically extends that benefit to alumni.
If you went to Uni, perhaps something similar is possible where you are.