hehe i think it depend on the car model / make, but in my little Suzuki i can take apart the center console rip out the double DIN headunit, run around the car 3 times and put the head unit back in the console and reassembly everything in 30 minutes, and all it take is a Phillips head screw driver.
But i totally understand such things are more or less alien to some people, my nephew couldn't even change a spark plug on a law mower if his life depended on it.
He can not build a computer himself, or put up lights in his new apartment, for that to happen he need to call upon uncle.
My friend while not affraid to tear into something and do have some DIY skills, installing a dashcam in his new car was like ???? how, so i had to break the ice and just tear that plastic off the A-pillar and show it to him saying " see it just snap in place" nothing to be afraid of.
Okay i have to admit when i first put in my headunit i could not figure out how to take apart the center console, but then i just drove to the dealer and asked them, and one of their guys just did it on the parking lot in 10 seconds, and i was like, " OKAY" it was that simple i just dident think about trying to pry off the plastic trim that reveal all the screws holding things in place in the center console.