The way vampires are created in 'Twilight' is pretty intense—it's not just a bite and done situation. First, a vampire has to drain a human almost to the point of death, but not completely. Then, the venom from their bite has to spread through the victim's body, which feels like burning alive (not fun, by the way). The transformation takes a few days, and it's excruciating—bones cracking, organs shutting down, the whole nightmare. The only way to survive is if the venom fully replaces your blood, turning you into a vampire. What's wild is that the process changes based on the person; some transform faster, some slower, and the pain level varies. After waking up, the thirst for blood is overwhelming, and controlling it is the first major challenge. Honestly, it sounds like the worst way to gain immortality, but hey, at least you get to sparkle in sunlight.
I always wondered why some vampires in the series seemed more adjusted than others. It probably has to lot to do with who turned them and how much guidance they got afterward. Edward struggled for decades, while others like the Cullens adapted quicker because they had support. Makes you think—if I ever got turned, I'd want a mentor like Carlisle, not some rogue vampire leaving me to figure it out alone.