1. Get wooden sword, Open door, Close door, zombies who came inside I will kill them, again and again, get out of that hole.
2. Get near the drowned, make him follow me, get him far enough, taking damage get to the air spot, breath and swim upward.
3. Bruh
4. Get wood, craft wood planks, crafting table(obviously), Get 4 sticks, Craft sword and boat, scuba divin fish huntig, munch fish, swim boat.
Unexpected Answers-
1. Create a datapack which gives me whole set of netherite armor and weapons and golden apples, kill that horde of zombies.
2. /effect NotThoughtYet water_breathing 10000
/effect NotThougthtYet strength 10000
3. Creative Mode
4. Get blessings from GOD and get flying power and leave that island.