Welcome and we're glad you found GT. I know everyone here is passionate about marriages and getting them started on the foundation of Jesus Christ. I pray that you are both heading in that direction and will seek counseling or mentoring before you consider marriage.
It's vital, it's necessary and it help get things out in the open. Some topics to consider speaking together about with a counselor/mentor are -
your spiritual condition and what a spiritual marriage will look like,
conflict, communication, leisure activities, expectations, concerns and family of origin.
I've often heard couples say. "We're really private people and really don't want anyone analyzing our relationship." What that really means is, "We do have problems and we don't want anyone else pointing them out and calling us to a better standard."
Surround yourselves with a strong support system (you'll need it) and those people will be there for the long haul to love you, cry with you, pray for you and do life with you. Everyone needs accountability and strong Christian friends to seek counsel and wisdom.