The Catholic faith is the Christianity originally handed down directly from Jesus Christ to his Apostles that he commanded to build his Church. The Apostles, in turn, handed down that faith (called the Deposit of Faith) to their successors (the Pope and Bishops) for the last 2000 years with unbroken continuity from Jesus Christ to you and me. So, What is that faith? What does it basically proclaim and teach? – To Love God and Love neighbor.
Love God = Practice through prayer/reverence/worship and belief in God as he revealed both who he is to us and what our relationship to him should be as disclosed through the Word (Holy Tradition and Sacred Scripture).
Love neighbor = Practice what he (God) taught and modeled through Jesus Christ and his commandments, again, through the Word (Holy Tradition and Sacred Scripture).
https://catholicstand.com/a-simple-explanation-of-the-catholic-faith/