20) Does film school guarantee me a job after graduation?

No, it doesn't guarantee a job to anyone.

You have to know what you want well before graduating; and you have to try to get your foot in the door by writing those scripts, talking to people, doing internships, etc...so you can generate contacts.

Film is not like other degrees where you get a job immediately after school (and even for some other degrees, you don't necessarily get a job right after graduation).
You will have to start small, and work your way up...i.e. "pay your dues."

However, that film degree can open up other avenues that might lead you to your goals..ie. film critic, reviewer, editor, etc..

You don't need to limit yourself, but be realistic.