Exactly back in the times you are speaking there was no written new Covenant per say for awhile and
Distribution of the Epistles to all the new congregations that were springing up all over took time
Palm 138:2 says God watches over his word thats why he Christ dwells within us Christains
The earlier men and women of faith had to walk more in the Spirit i believe,the spoken word is very powerful and Christ told his Apostles they would remember all things spoken by him regarding what they should no,they appointed what i call Deacons like Steven.OT did not Jethro tell Moses to appoint
Men of good Character Elders to help judge the lesser matters to some weightier matters of the Jewish nation because it was to much for Moses alone.things have to start somewhere and proceed forward,I just thank GOD for men and women of faith.also remember that Arron andthe priesthood had special garments they wore.Bishops have garments the Pope his hey some wear suits in other Congregations we have seminarys we have the internet that is full of good and bad.The best thing is we are not left orphaned we have the Holy Spirit are Paraclete whom if we allow will guide and direct us in Christ.The written Word of GOD in Paper form is in a great deal of languages due to printing presses.TV and Radio Short wave Radio It is not up to me to judge any of my Christian brothers or sisters in Whom say they are Christain if they say they are then there they are and I’m not saying you are I have learned much from just reading post here at CF.
We all think where we worship at the present is from GOD only Christ will judge us.