Mine Ancient Debris in the Nether, usually at Y-level 15
Smelt Ancient Debris into Netherite Scrap
Craft 4 Netherite Scrap with 4 Gold Ingots to make 1 Netherite Ingot
Use a Smithing Table to upgrade Diamond gear with a Netherite Ingot
Find Ancient Debris with TNT, beds, or branch mining in the Nether
Loot Bastion Remnants for Netherite-related items and materials