I could still go to the lake of fire if...
You couldn't, because it's just as much make believe as the starship Enterprise.
You do know that the starship Enterprise is
pretend, right? Just like Hell, or Pokemon, or God, or Sherlock Holmes?
Humans love a good story. Sometimes they lose track of what is stories, and what is real. The actor who played Den Watts on the long running British soap opera
Eastenders got death threats when his character cheated on his fictional wife on the show.
You are making similar threats (to yourself - threats are dumb, but threatening yourself is pathological), but those threats are of fictional punishments, which is even dumber.
Warnings about being cast into the lake of fire after death may seem scary to you, but to me it's like being warned that Darth Vader will behead me with his lightsabre.