There is no one definitive answer to this question, as the crafting system in Elden Ring is expected to be very robust and complex. However, some basic steps on how to craft things in Elden Ring can be outlined.
First, players will need to gather the necessary materials for whatever they want to craft. This can be done through exploration, combat, or other means. Once the player has gathered all of the required materials, they will need to bring them to a blacksmith or another crafting NPC. The blacksmith will then forge the item for the player using these materials.
The specific details on how each item is crafted will vary depending on what it is. For example, weapons and armor will require different types of metal and other ingredients, while potions and scrolls will have their own unique recipes. Players will need to experiment with different combinations of ingredients to figure out how to create the items they desire.