The Pre-Cana training is required for all Catholic marriages, and our particular training which lasted 3 days included a great deal of discussion of Christian values in marriage, such as respect for each other, solving conflicts, and communication.
My husband and I also had the advantage of both coming from homes where Christian parents (mine Catholic, his Protestant) had been happily married for a very long time, so the training didn’t really add much to what we had already learned watching our folks, especially since we were in our 30s, not starry eyed teenagers.
And yes, my mom swore by that Fulton Sheen book. I’ll admit, I never read it myself, but she thought it was the best.
Having said all that, I don’t know what you mean by “a worldly marriage” or why you would think Catholics would have such a thing. Marriage is a sacrament, not some worldly thing for us, especially since one doesn’t just run out and get a divorce if it doesn’t work out.