Problems in placing products online! Help!

Problems in placing products online! Help!

Hi everyone!
New customer, quite new to D&B, and I'm trying to understand how the platform operates.
My team and I have have a few designs we'd like to upload to our store, but we're having trouble because we're not familiar with specific concepts.

1. What's the difference between "Layout", "Template", and "Product"? How do I assign a design to each of these categories? If I design a template, how do I turn it into a product? How can I place the product online?

2. What are the conceptual differences between "Website", "Store", and "Store view"?

3. Where can I configure my stores, the categories they'll have available, their language, etc?

Thanks ver much in advance!!