My rule #1; Don’t just ask people for advice! Find a Rebbe, Rav or mentor to discuss your issues with.
A great Sefer is Veyodata Ki Sholom Oholecha.
My advice is to make sure that your kallah knows that she is the #1 person in your life. No one comes even close. Do this in both words and actions.
It’s normal to be nervous before taking a big step. Relax and enjoy, I’m sure that you made a great choice with your kallah.