Yep, check the fuses first.
Be sure to read post #3 in that thread you found.
Hopefully, the procedure will become clearer once you get an eyeball on the mechanism.
Since I don't have an AT, I can't give you any first hand knowledge.
However, I do have a back in the day story. A long time ago, I flew into Raleigh/Durham airport in North Carolina, to do some business with some of the companies at Research Triangle Park.
I renter this brand new car at the airport and drove to RTP for my first appointment. After my appointment, I fired up my new rental car but the shift lever for the AT wouldn't come out of PARK. I fiddled with it for a while then, since I was running late, I gave it a big ol yank, something popped real loud, but it came out of park and I was on my way.
When I returned it to the airport, I mentioned the incident to this pretty, young girl behind the counter and that it needed to be fixed. She asked me if I had pushed on the brake pedal before trying to get it out of park.
NO! I replied -
I went away mumbling something about stupid new fangled things on cars - why don't people just learn to drive the fucking things without all of the nanny BS. Besides, there weren't nutten wrong with standard transmissions -
THE END