As far as his epic fantasy stuff goes, I started with Mistborn (starts slow, but finishing the 1st trilogy is mind-blowing) & my friend began with Elantris (release order, in my opinion, his writing gets better every book--there are now 50 & I've read/loved nearly all of them). Alternatively, Way of Kings could be a good starting point as well (my personal favorite).
And of course there's a ton of non epic fantasy (Skyward & Steelheart skew younger).
And of course there's a ton of non epic fantasy (Skyward & Steelheart skew younger).
See also: https://www.brandonsanderson.com/where-do-i-start/