Fresh corn can work really well. You will need quite a bit of it.
10 pounds sweet corn: I would cut the corn off of the cob and add it to a large mesh bag. Mash the corn with a potato masher inside a large kettle.
Add water to reach 5 gallons of total liquid
Heat liquid to 155 degrees
Add 2 pounds of malted barley (malted and ground in a mesh bag)
the temperature should drop to around 149- let it rest here for an hour
Take a hydrometer reading
Add sugar if needed to reach 1.065 starting gravity
Remove the mesh bags and strain the liquid
cool the mash to 165 ish
add yeast
ferment