If your barcode matches an ASIN, the work gets much shorter
There are two different ways to list on Amazon, and which one you land in depends on the catalogue. If your product already exists in Amazon's catalogue — that is, your barcode maps to an ASIN — you do not create a new product record; you place an OFFER against the existing one. Very little information is needed then: SKU, price, quantity and condition.
If the product is not in the catalogue you have to create a full product record, and that is a longer job: Amazon asks for a product type and the mandatory attributes of that type for every listing. With your own manufactured goods, or products specific to Türkiye, this is usually the path you land on.
Knowing this upfront helps with planning. If you are reselling — carrying existing brands — catalogue matches are high and going live is quick; if you are launching your own brand, budget for filling in attributes on every product.
There is also one mandatory field: without your seller identifier (Merchant Token) no listing can be created. You take it from your Seller Central account.