Have the freon purged by a shop certified to do AC work.

FWIW, I only remove A/C systems that are already bad and self-depressurized. There isn't much point in removing a working system.

It is pretty straight-forward. Unbolt the compressor and bracket, the lines, then go inside the cabin and pull the junk from the duct. You'll end up with a bit more then fourty pounds of stuff to dispose of.