The first thing you'll want to do to reach god mode with Minecraft commands is to give yourself the best gear available. Start with a full set of netherite tools and armor.

You can turn on cheats in Minecraft by enabling it when you create your world, or by going into your Settings.

Use the tools- there are online tools available to help locate geodes using the World Seed. Mine carefully- use a Pickaxe to mine fully grown Amethyst Clusters for the maximum shards.