start walking and looking around.
you'll get a map at the gate, it should show the locations of the installations, but basically just walk away from the city blocks (there's art there too of course) toward the Man and toward the "top" of the map you can see online of the city.
you won't have any trouble finding art!
if you are looking for a piece in particular, and if it's not large, then you may have difficulties finding it.... check in at the artery if that's the case.
but just ride/walk and head to the nearest thing that looks interesting. Look at it while you drink some water. Stay and play if you wish. Rinse and repeat.