Seeds will grow into papertowel if you're not careful. Could damage taproot.
I prefer a shot glass filled with water, pop seeds in glass (they should float on top of water). Cover with a kitchen towel, and pop in a cupboard for 24hrs.
Seeds should sink to bottom of glass if they're viable. (may have to stir the seeds in case of air bubbles).
Remove and plant.
I usually see the seed cracked, and root starting in the bottom of glass before planting.
Peace