The rule of thumb is to plant seeds at a depth equal to two or three times their width. For a pepper seed that would be about 1/4 to 3/8” deep. A common mistake is to plant them too deep. This inhibits their growth, not only because they may not germinate at all, but also because their stems may not be designed to push through the heavy pile of soil above them. It is better to plant seeds too shallow than too deep. Read the seed packet carefully, for detailed information about how deep to plant seeds.
After seeds are planted they need daily attention and lots of tender loving care. If you cannot monitor them daily, checking on soil moisture, temperature, germination, and lights, you will reduce your chances of success.