To understand more about the Church and her teaching, or to be able to refute objections from non-Catholics, there is a marvellous body of work at Radio Replies - Catholic Apologetics
On this site you can browse over 4000 questions and answers about the Church and her teachings that were the result of radio programmes conducted by Rev Dr Leslie Rumble, M.S.C. on the Catholic Broadcasting Station 2SM Sydney Australia in the 1930s and 40s. Rev. Charles M. Carty from the US also collaborated on the published work. The questions and answers are still, in the main, relevant today. Happy reading!