Books

Brandon Sanderson Cosmere fits the bill and is super easy to get into.

The Mistborn series might fit your description the most. But my personal favorite is The Stormlight Archive. The Stormlight Archive is what got me back into reading.

What makes the Cosmere so easy and enjoyable to get into is that different series are only vaguely connected. They take place in the same universe but on different worlds or realms. But since they share the same creation "myth" there are similarities between these worlds. When getting started a lot of the connections feel more like an easter egg. An easter egg that teaches you about the history of the universe.

But each series is basically self contained. Most characters and people aren't even aware of the existance of these different worlds. The focus is mostly on the specific world. Meaning you don't have to worry about reading order or missing out. Heck, if you don't enjoy a specific series you can even skip it without losing too much.

There are a few unpublished or planned books that will focus on the connection of these worlds, on characters that travel between them. They will probably be the most enjoyable if you read everything in the Cosmere.