That's called man rock (milky quartz)
. Points can be made, but it is tough stuff! Unfortunately you are in an area that doesn't have a lot of large and good deposits or formations. I spent the first few years down by Monticello looking for chert and would occasionally find small white/grey/ brown pieces in plowed fields or in the creeks/rivers.
It should flake off and have sharp edges on both pieces. Glass such as flat bottle bottoms, plate glass 1/4" thick, and glass tile are all good starter material for starting to knap. If you have a recycle center near, go check out their glass area and find beer or wine bottles that have flat bottoms to practice on.
Tracy