Help with high desert montana (5a) first plants

Hello! Im looking for any resources you may have for best plants to start “greening“ my high desert Land. it‘s south Montana reported zone 5a. And seems to get around 6-10 inches of rain per year At an elevation of 4200 feet.

before the robust edibles, i want to increase vegetation on the land and hopefully mimic the techniques Geoff Lawton (and others) have done in dessert climates but in this zone. that said, my first goal is to plant the proper starting plants such as trees.

if you have any resources specific to my climate please let me know!