Peace and all good!!
Personally I think that marriage education from 6-9 would be more out of place
In the Catholic Church marriage is a unique sacrament in that it is the husband and wife which complete the Sacrament with God. The Priest or Deacon are only there as a witness.
Since your marriage was outside the church and you were Catholic by virtue of Baptism you are civilly married but in the eyes of the Church not. This can be resolved by having your marriage blessed by your Priest. You can have another wedding if you prefer but it is not necessary.
Since a marriage is a sacrament you can not undo it, this is why we do not believe in divorce. You can be civilly divorced as a Catholic but before someone were to remarry it would have to be annulled.
The other persons comments on the “sex thing” was that Catholics do not believe in premarital sex and since your marriage is outside the Church as Church it is seen as sin.
Personally I suggest just talking to your Priest about it. I am not going to be the one to sit on a podium and say not to have sex with your civilly married wife. I carry WAY to many sins to tell anybody to do anything. “Let whoever is without sin cast the first stone”.