Yowm beat me to it. Above all else, pray, fervently, daily, ceaselessly. No one can truly come to God unless they are called. The Spirit needs to work powerfully in your wife's heart to draw her to the truth. Pray pray pray that God will soften her hear to Himself and the Bible first, and you as well. Pray that God gives you the opening to be a Biblical husband.
Might I also recommend you look up Voddie Baucham's "Love and Marriage" sermon on Youtube? It's a powerful unpacking of what Biblical marriage is really supposed to be. I would start by watching it yourself, and then waiting for the right time to try to get your wife to watch it once her heart is more open.
God bless you richly! Also, don't go this alone; I would suggest you post about this in the prayer forum as well, many of us would be happy to pray for you and your wife daily!