Start up the world with the seed 190800072 on Easy, with the bonus chest and coordinates turned on. Craft a sword, and make your way towards 440, 65, 460. This is the location of the Pillager Outpost. You can either make a bed to set your spawn here or copy a save of this world in case you die. You’ll know which one is the Pillager Captain because they have a large banner over their head. It’s best to attack him when he is alone away from the tower as his guards can be annoying to fight. Once you kill the Captain, you will receive the Bad Omen effect, as well as an achievement.
Now head towards 560, 65, 520. This is the location of a village. Upon entering the village with the Bad Omen effect, a raid will commence, and you should get an achievement for starting a raid.
You have some time to loot the buildings for bread as well as set your spawn with a bed. The raid consists of 3 waves, with 4 enemies each. Try to draw the pillagers close to buildings so you have some cover from their arrows. Once the enemies are killed, you’ll have some time to heal up and put on any armor that was dropped before the next wave starts.
The Ravager spawns in one of the last waves and he looks like a rhino. Kill him to get the achievement and finish off the remaining pillagers to complete the raid.