if you just have one city i’d travel far away and build a new settlement where you don’t feel restricted by aesthetics, then connect via rail network, some projects i’ve done are: build ur irl house, build a stadium, build intentionally ugly structures (there’s just something fun about not feeling forced to make something that looks good and building wacky rooms, feels like early minecrafting), take inspo from real life places you’ve visited, make map art
have you done some of the side quests the game has to offer, like - getting a sniffer and the new plants - breeding the best horse - building a farm with allays - trying to breed a blue axolotl - filling out your achievement list or future proofing your game for future updates like getting an enchanted book trading hall?
make a mount rushmore with your skin, build a settlement to a terrain (i.e. mountain town in snow biome, swiss village in valley), build an inexplicable 25x25x25 obsidian cube, build an amusement park, if you got older minecraft worlds recreate some of those builds, build a museum, just find pictures online of vibes you want to recreate, build stuff from other video games (like i built the wii sports sword fighting arena)