cracked corn is doable, but a pain in the ass and generaly considered out dated. ( cooking the cracked corn is an art to do it just right) Either start with the pf tek and follow it to the T, or do a wild bird seed grown spawn- then to bulk or a simple growbag spawn to bulk....google and shroomery...all you need.
ps, you mentioned you have a cool dark basement,Thats not optimal for cubensis grows, these shrooms actually need light , high humidity, and allthough being tripical species, actualy do just fine at room temp, and those wild mushrrom spores could cause havoc at some point.
and i alwase reccomend using shroomery vendors for spores. they hold the bar high for their vendors so you know u can trust'em