You are newlyweds - I don't think marriage should be discarded so easily.
I can understand your frustration ..... but you need to exhaust all avenues before you give up on your vows, IMO.
He told you that he watches so much porn - to kill time? Geesh. I would tell him if he has so much time to kill maybe he outta get a job. I know you said he's going to school full time.......but apparently that's not enough to fill his hours.
You are more liberal than most women that complain about porn. At least you don't mind him looking at it ..... you just don't want him spending so much time looking at it. Nothing wrong with that.
I would sit him down and tell him if he values the marriage ...he needs to work on finding a middle ground with you. Tell him he needs to let you know what is more important to him.... your marriage or porn. Tell him you don't mind him looking at it in moderation. You are just worried about him and the long term prospect for your marriage.
Try to talk to him calmly.....don't demand anything of him. Otherwise he will be on the defensive and you will get no where.
When you are done talking with him - kiss him on the lips and tell him you love him ....then walk away and let him think about it.
Then wait for his next move.
If it's not the move you want .... try counselling.