I was wondering if I want to say that a graduate-soon-to-be is getting ready to start his new job and will face many new challenges in society, which of the following are correct?

1) When he steps into the society, ...
2) When he steps in to the society, ...
3) When he sets out in the society, ...
4) When he steps out to the society, ...
5) Any other possible phrases?


One more question: Sometimes, I don't see the definite article 'the' in front of society, so is 'the' required in the above phrases?

MANY THANKS!