Before he becomes spiderman, Peter Parker is a nerdy student who gets bullied by classmates at school. Peter Parker's uncomfortable environment is school.
Meeting the mentor
Peter, you must know that with great power, comes great responsibility.
Peter receives his call to adventure after he is bit by a spider and wakes up with powers becoming clear that he must do something.
Crossing the threshold
Not so fast!
Peter shows refusal of the call by using his powers to win matches at an underground wrestling ring for money.
Testing allies and enemies
Peter's mentor is his uncle Ben. His uncle is his mentor because he tells Peter that with great power comes great responsibility.
When Peter stops his uncle's killer, he crosses over the first threshold and sets out on his adventure by using his powers to stop crime.
When Peter becomes Spiderman, he takes pictures for the newspaper. This is him testing his allies and enemies because when other hereos or villain's see it, they will decide whether to join him or be against him.