Returning player - Holy / prot paladin - Warrior/mage/warlock

hello, I just returned about a week ago. I played consistently since launch up through TBC - quit to have a family and start a business. Now that the kids are grown up I’d like to start raiding again or doing mythics.
I’m hardcore casual - meaning I played hardcore raiding / min max- but my timelines are casual due to family / work.
I used to play with Eternal reign back in TBC - not sure if any of them are around anymore.
my time zone is eastern. so any 8-9pm est start times would work.