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Question: Masonary Grid | Pinterest Grid | With Multiple Collections or Categories

For a couple of days I have been thinking about a Pinterest Grid or Masonary Grid which randomly should contain all my collections or categories and appear on my homepage.

That means: As soon as I write a new blog article (blog collection page) or add a new product to my shop (shop collection page) or publish a news article on another page (news collection page)

If I write a new product on another page or in my news post (all are in different collections) on my page, it will be updated on the start page (homepage) and appears first.

Either I’m blind or I can’t find a valid article. Do you have an idea or a solution or even a tutorial you can link me to? Please I need some support!