New seller brand approval before brand registry

Hi everyone – I want to start a private label and sell on Amazon. I found a product with lithium ion polymer battery inside and want to create a listing to see if Amazon allows me to sell. I have a brand name I created and want to use. I haven’t not applied for trademark yet.

Do I create a listing using my brand name XYZB (fake) and then apply for brand approval when it prompts me? I think I should do GTIN exemption as well. Is it better this way or I go buy a UPC? To sell this product, can I submit an exemption form for battery and product with battery? Because the MSDS from the supplier is for the battery itself and not the product.

I appreciate all your comments and input. If you advise not selling battery product at first, I’d like to hear your opinions as well. Happy selling and good luck in the new year!