Amazon storefront/ brick and mortar help

Hi!

I am a small bus owner- I have a brick and mortar play space/ class space. I am trying to create additional streams of revenue.

One way I want to do that is sell on Amazon the items that we carry in our space. I am clueless so be kind. How does storefront work? It seems like influencers are selling/ promoting items already sold on Amazon and Amazon fufills them- is this accurate? Do they then get a cut? I’d also like to sell things I’ve made myself.

Thanks!