For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
Most of what you said by using the scriptures you gave is very much accurate, however let me show you a more excellent way. To find or to receive salvation we must go to where the Church first began in history; Church history began in the book of Acts as recorded in chpt 2 & beyond. There you will see & read that some 3000 & 5000 souls were saved after Peter preached Jesus unto them that were present; when they were moved by the gospel message they said to Peter "what must we do",Peter said, "Repent, & be baptized everyone of you in the name of Jesus Christ, & you shall receive the gift of the HolyGhost". We all must follow the example of the Apostle's teachings & doctrines. This is how the Church first began & it is continuing unto this day.