There are quite a few different entry points into Brandon Sanderson's Cosmere universe, none of which require any prior reading to jump into. I'd personally suggest starting with the Mistborn trilogy, which are some of my favorite fantasy reads of all time. This trilogy represents Mistborn Era 1, which is essentially the first set of books on the timeline for the world of Scadriel. There's also a Mistborn Era 2, which takes place in the future, but as far as we know it's the first trilogy that Sanderson will be adapting into feature films.
The other box set featured here is for The Stormlight Archive. The set only includes the first three books in the series, but it's an excellent starting point into Sanderson's biggest series in all of the Cosmere. Each of these books are quite long, but they are deeply immersive and absolutely worth diving into. It's this series that is currently being looked at for an Apple TV series.
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