Where is the best place to learn Magento 2?

Question

Magento

Hi all!
This is my question: I want to delve into Frontend in Magento 2. Please tell me where I can learn more about all the nuances of creating a store with a lot of products, categories, etc. - I just can’t find what I’m looking for anywhere. I found it and now I only know how to create a theme and turn it on (it's very simple). And how to configure further - I do not understand. I want to learn how to fully create a website (int. store), and then go to the backend. Basic knowledge is available. Suggest something good.
Thanks for understanding and help. Waiting for your response.