Find tall grass in plains, savanna, meadow, and similar biomes
Break tall grass to get wheat seeds
Till dirt or grass with a hoe to make farmland
Plant wheat seeds on farmland
Keep the farmland hydrated with water nearby
Wait for the wheat crop to grow through all stages
Harvest the fully grown wheat to get wheat
Use bone meal on planted seeds to speed up growth
Find wheat in village farms and chests
Trade with farmer villagers for wheat
Kill certain mobs or open loot chests that may contain wheat