Met the fabulous Lady Skol as we both turned 17 and have been together ever since. Married in 2001and I am now 43 with two children age 10 & 13 so I guess I qualify for giving 'advice'.
My advice would be to ignore most advice. Most of it is people telling you what they would do, and look where that has got them. 2nd & 3rd marriages, resentment and selfishness!
You WILL have to compromise but don't be a pushover. Be completely honest, even if you have been an absolute idiot, you have to be able to trust each other.
Marry for the right reasons. Don't marry to avoid being alone or because she is forcing you or because it is expected. Marry the person you wan't to spend the rest of your life with.
Do things the way that works for you as a couple. Some of the previous advice has made me want to slap the posters. Seperate bank accounts, hidden money, extra-marital relationships, all signs of a bad relationship doomed to fail. Have your individual earnings paid into different accounts if that works for you but there is no reason they can't be in joint names if you are marrying the right person.
Most importantly, be friends.
I hope you are both very happy and wish you good luck
EDIT: I type too much/too slowly, beaten to it by
@srw