BulletLukey has made an awesome world for this. You can join our realm (as long as it still runs) or download the world yourself.
In this world, it takes roughly 3,5 hours to get the achievement!
You will need to play for 100 in-game days. Sleeping in game does not speed up the progress. You can track your progress, if you go to the ingame achievements tab. I would advise you to let your device idle for a while. 100 in game days translates to 33 1/3 hour (1 ingame day is 20 minutes long).