Life is complex yet simple depending on what you are going through and the decisions you make. Personally I think one needs a personal relationship with God and whatever anyone does should not be a marker or benchmark of any religion or faith. Seek and you find, ask and you shall be given, knock and the door will be open for you. Keep faith.
Depends on what you believe to be your God. Who made you believe he is God? How did you find out about him? How do you go about having a personal relationship with him?
All the questions you asked are good questions unfortunately I may not be able to answer all but as for how I found out about him, the truth is he found me. I do hope we could have a personal talk over this sometime. Stay blessed.
There are many things you can't answer about yourself and Many mysteries the scientist can't hold unto, this means there is a mystery hidden from men that only someone more superior than human holds and I believe that person is God.