Church, Bistro and Theatre

I know that Martin Luther found a lot of fault in the Catholic Church during those time’s but I don’t understand why it came to be the beginning of a total knew religion. It could have just been to prove a point that the Church was not following its original roots. Besides the Church recognized its errors and corrected itself by having the Council of Trent.

I am guessing most people who are raised as Christan’s attend the church that their family attends. However what if none of your family attend church? How do you select what church you attend?