Can you tell what kind of corn you have? I had Luther Hill heirloom
corn that were viable after 8 years. Hard and roundish kernels are
probably pop corn, wrinkled seeds are probably sweet corn and seeds
with a small dent on the flat side is for flour.

I would use damp paper towels, keep the seeds spaced an inch apart.
If possible, change the paper every day. You'll expect some to die
and become mouldy, don't let those seeds infect seeds. Good luck!