LoveMysoldier
Your name implies that you are either the mate of, or the parentof someone in the military. GOD BLESS YOU!
One of your questions was about the Virgin Mary, her assumption (transportation) into heaven, and where you could read about it. As others have pointed out, that particular event is not in the pages of the Canon of the Bible; however it can be found within the pages what the Church knows as The Proto-evangelism of James. GDE I believe, has already posted about Tradition, and sola Scriptura (Scripture alone), so you know that the Orthodox cherish written records more than just the 60+ books of the Protestant Bible.
You also asked about Confession; and in particular, confession to the Church. There's a special season of the Church year called Great Lent, which lasts for forty days. One Sunday in that time frame is called Frogiveness Sunday. Those in the congregation literally ask forgiveness of all present; this is the cnngregational scale of what Our Lord commands on the personal/ individual level, "Therefore if you bring your gift to the altar, and there remember that your brother has something against you, leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift". (Matt.5:23,24)
This command of confession (which someone else has referenced) the Apostle James links to personal life, wherein the Church derives the mystery/sacrament of Confession. So, you see, confession covers the personal life(your relationship with God), the Church life , and your social life.
First and foremost, we confess to God Almighty; it is then a matter of humbly submitting ourselves to the disciplines of God commands, and the Church authorities. As Anonykat has said, "our actions often resonate deeply into the lives of others". We are a body, the community of the faithful.
Although we were received into Orthodoxy a few years ago, my wife and I are trying to get to the point where our lives revolve around the Church year, and not around the 4H or the Home School Group schedule. Making such a switch is also very important for spiritual growth, and having an Orthodox mindset, as you've noted.
asaus