"The Villainess Tamed the Prince" [Short Version]

The night before my tenth birthday. I had become aware that I had been reincarnated as a villainess, which was fine, but I had almost no knowledge of otome games, which was the real problem. I died right after playing the prologue of my first otome game ever. I don't know the main scenario of this game, nor do I know what tropes are. And yet, I possess only unnecessary knowledge that my friend told me before playing: "The villainess is condemned in every route" and "The villainess is sometimes burned to death by hellfire depending on the ending." It's too late now to regret that I should have asked for more details. There's no one in this world to tell me exactly what happens and how I end up there, and no one to point out "What is hellfire anyway?!" I have no game knowledge, no special knowledge or skills. Furthermore, my head isn't particularly bright either. To break through the situation, I—someone lacking in everything—came to one conclusion: "I must not become the First Prince's fiancée."