It's a fairly easy project too.
But just make sure:
- your engine is cooled down
- you are on a flat surface
- you have something to catch all of the coolant that will drain out
- And that you have a new bottle of coolant to put in.
I'd say it should take you 30mins - an hour, depending on your mechanical skills, and how dirty you get ... lol. ... oh, and whether or not you are drinking a bit while working.
Hey some of us enjoy a beer or 2 while working on the car.