I just recently started reading some of the daily forums on Catholic Answers with no intention of actively engaging in any posts, however, when I came upon your question today I felt impelled to respond (the Holy Spirit works that way!). I too have “Catholic” family members that are not practicing (father, mother, and siblings), which can be extremely difficult especially come Sunday morning.
I started reading a great book by Matthew Kelly called “Rediscovering Catholicism”. I am not quite there yet, but I flipped forward to the chapter about “rediscovering the mass” for you. From what I read, it’s equally as great. Here is the opening paragraph: “At the center of the Catholic tradition is the Mass. It is in the Mass that the 1.2 billion Catholics around the world come together to share a common experience. But the wisdom of regular worship has a much deeper meaning than bringing us all together once a week; it is a profound reflection of God’s blueprint for all of creation.” He discusses the reciprocity of Mass: it’s not only a time to give worship, but also to receive the body and blood of Jesus Christ. He recognizes Mass as a “privilege” instead of an obligation. The entire book calls Catholics to reevaluate the way that they live out their faith, inspiring them to love the beauty and the truth of the Catholic faith.
You can get a free copy at: rediscoveringcatholicism.org/. There is a $5.95 charge for shipping, but it’s worth it. My husband and I bought six of them to give as gifts this Christmas. We will be giving one to my mom and dad, and hopefully, my sisters will one day find interest in reading it. Who knows? Maybe my in-laws will pick it up someday (they are not Catholic, but we are praying).
I hope this helps. I will pray for you and your father.