@FNFA
There are few ideas
1- A small farm: You can build a farm for crops such as wheat, potatoes, carrots, and beetroot. You can also add a few animals like cows, pigs, and chickens.
2- A treehouse: Build a small treehouse in a nearby forest or jungle biome. You can even connect it to a nearby tree with a bridge.
3- A watchtower: Build a watchtower on a hill or a high point. You can use it to keep watch over your surrounding area and keep an eye out for hostile mobs.
4- A fishing dock: Build a small dock near a body of water and create a fishing spot. You can even add some decorations like lanterns and benches.
5- A small mine: Dig a small mine and explore the underground. You can find valuable resources like iron, gold, and diamonds.
6- A small village: Build a few houses and create a small village. You can populate it with villagers and trade with them.
7- A lighthouse: Build a small lighthouse near the coast. You can add some redstone to make the light turn on and off.
I hope these ideas help you spark some creativity and inspire you to build something fun and exciting in your survival Minecraft world