There are many places, like Mistborn is a good series, but it's one of his early works and probably not the most well written. You can try one of his secret projects, 4 books that he released last year. 3 are part of Cosmere, but they are written as standalone books. 4th is a completely standalone book. All are nice, noncommittal way to read some of his work.

You can also try one of his non-cosmere series, like Cytoverse (starting from Skyward) or The Reckoners (starting from Steelheart).