Nixtamilizing Corn for Tortillas
Too long for comment so:
I should think fresh would work. It's just dried that comes prehydrated. I'd cut down on boiling time. Say 5 cup corn, 1.5 gallon water, 1/4 cup CaOH (Cal, slaked lime, pickling lime). Boil gently 30 min (instead of hour). Let sit overnight. Rinse 4-5 times to remove excess CaOH, put thru your corn grinder to make massa. add a tablespoon or two of salt, about 2 cups water to get texture right, mix well. Should make about 2400 g masa -> enough for 40 tortillas. If unlucky, your prehydrated corn will turn to useless mush, but I don't think that's what happens. Don't rinse the nixtamalized stuff too many times. That removes CaOH, but also the corn coating that holds the tortilla together while cooking. CaOH is bitter. Crumbly tortillas are no fun.

I made my press out of maple wood, with sheets of flexible storm window plastic to keep massa from sticking. No need for that expensive metal contraption to make 5" tortillas Cooking goes smoothest if you have two 2 tortilla size griddles. That way you can cook 4 at a time. The timing works out to keep you busy, not waiting. If you have vertigo though it will make you dizzy.