Welcome - hope you enjoy your visits to this sub.
Thank god I've only had to deal with one of those cheap, not meant to be reusable freewheels once. I mostly followed a Park Tool helper video I found for "Destructive Freewheel Removal." Basically just break it apart to get it off. But I kept a close eye on the loose small parts and was careful with the ball bearings so it did get put back together to live another day with another person who was happy to be given it.
Have fun with yours...