Amazon’s Packing Requirements
“The devil is in the details”

What quantity of each type of product do you need to buy to keep your expenses in line for the percentage of overhead you need for your pricing? Don’t forget freight to you and storage space and shelving.
Add in the carton tape, the pallets for the quantities you send to Amazon and that expensive stretch wrap to hold the cartons and bags on the pallet.

Are you checking the weight limits for shipping costs?

Here is one of many orientation videos  This one is 16 minutes.

youtube.com/watch?v=3DtbcEtgjjw

Here is a video from Amazon Seller Central
https://sellercentral.amazon.com/help/hub/reference/external/G200141500

Here is a site from an e commerce fulfillment service
https://www.efulfillmentservice.com/2024/08/amazon-fba-packaging-requirements-a-fba-sellers-guide/

Start making your lists and checking them twice.
On all websites be sure to read the reader comments.
They provide confirming and conflicting experiences and advice.