Googling around I see that there is some mixup with sorghum also being called Milo or Great millet, whereas millets actually are biologically different from the sorghum group - 
https://www.savorysuitcase.com/millet-vs-sorghum/ .
Around here proso millet has been grown traditionally but has faded in the last decades as the aim of producing more and more corn and wheat pushed it out. Lately sorghum has started making an appearance, primarily because of resilience to creative weather, grown mostly for silage and biogas but I'll try to grow a grain crop. Nowadays there are various cultivars available optimized for green volume (grows like bamboo) or for grain (much shorter stalks and generally more manageable plants).
Our land is too small to make a tractor and combine harvester economical but we have the option to hire someone in our village with the proper machinery so that's OK.