Hi Y’all, Need some help setting up a new Listing

I’m a brand new seller on Amazon and I’m ready to make my first listing ever on Amazon. I have all my other info ready.

But I am not sure about the Product ID. Like what is it? or where do I get it. Should I generate one of my own (if yes, then how?).

Edit: It will be my own product under my name but there are other similar products available out there.

also, let me know, if you guys have any other tips for a noob 🙂

Thanks a ton!

https://preview.redd.it/glvrki6e5uc61.jpg?width=1082&format=pjpg&auto=webp&s=2b1b6d0edfeeb9d74dfa73b7393f2c4970389e73