Here the hero receives a message or challenge that calls them to begin their journey. This could be a prophecy calling on them to do a certain mission or a someone actually calling them to action.
As Katniss prepares and trains for the games she is going through her trials. The pinnacle of this was when she went to be judged and she shot an arrow at the judges hitting a piece of fruit.
During the games Katniss faces death many times and kills others to stay alive. One of her many near death experiences was when she got stung by tracker makers causing her hallucinations and almost death. She sleeps for two days and is reborn as Rue nursed her back to health.
Katniss gains her and Peeta's life back. They go through yet another near death experience with the night-lock and force the Capital to return both of them home.