Patience my friend, germinating seeds has become one of the easiest parts in the grow for me. Depending on how long the tap root is dictates on how deep i put it in the soil, but usually just a pinky finger nail deep.
In the past year, I have germinated I would say 50 seeds, all with 100% rates. Throw it in a damp paper towel that has been wringed of every last drip of water, throw them in the bag, put a drop or 2 of water in the bag to raise the humidity a bit.
About a day and a half later is when I usually get a small tap root, which I prefer them to barely be cracked then to have a 1/2" tap root.
Grab a gallon pot, I never germinate in solo cups since they dry out quicker and I don't want to transplant them at such a young age when they get root bound.
Water the soil a bit, make a hole with my pinky and do my best to be as gentle as possible and put the seed in there where the tap root is more so sideways or facing downwards if its small enough, slightly cover it with some of the wet soil (DONOT pack the soil down on it) cover it a bit with some dry soil and put a 2-3 tbs of water around it, never water directly onto it.
Check on it everyday just to make sure its not dry, which it never dries out on me and boom 2-3 days later I always have a seedling. I start my seeds outdoors, so I always try to start them in a greenhouse or atleast get a plastic film to throw over them to bring the humidity up a tad and the heat.
Btw just something to maybe think about. This method has worked the best with me with no fails yet heh.. 
But yeah think every one gets to make those mistakes hehe.
