I need to know how many sq. ft. your front yard is ? But generally you can split your seed into two 25 Lb. application's of milorganite. But plan on getting two bag's, with that first bag you can practice applying the product. (it spread's fast) The more pass's with the spreader you make, the better your seed coverage. Don't worry about putting too much nitrogen down, milorganite is gentle.
"coated" probably mean's that the seed has a thin layer of fungicide on it. That's a nice idea but that stuff is long gone by the time the seed germinate's. Can you post the link for the seed you are considering ?