The Self Service Repair will chiefly focus on repairing batteries, displays, and camera issues at first. Apple will introduce more complex repairs to the service later on in 2022. The store offers over 200 individual parts and tools, most of which are used to repair Apple smartphones.
You'll have to refer to Apple’s Repair Manual before contacting the company for an order of "genuine parts and tools" from its Self Service Repair Online Store. Then you ship the used parts to Apple, which will then give you a credit toward your purchase. The service will also be available for Apple products no longer under warranty.
Apple details that its new service is meant for "individual technicians with he knowledge and experience to repair electronic devices," and advises most of its customers to continue using professional repair services.