It doesn’t cost a penny. You take your evidence of alleged criminality to a prosecuting attorney such as a city attorney, a county attorney, a district attorney, a state attorney general’s office or a U.S. Attorney and if the evidence is solid, they take it from there and convene a Grand Jury investigation.
That's not how this works at all. The legal system takes one look at your evidence, says "Sour grapes for losing the election, and besides, we are not going to DARE rule against "Historic first." And then they say you don't have "standing."
Nero Germanicus then comes along and counts that as another "Win" in his tabulation of court cases he always likes to trot out, and which he seems to think proves something.