Breaking the bread
Can we say that Jesus “ordained” the Apostles? He certainly “commissioned” them and “sent them out” (his words) with authority to teach and heal. By implication they were to lead the Church as it was born. We can hardly say they were “ordained” in any recognisable way through a rite or ceremony.
The first Christians were to follow Christ’s command to “do this in remembrance of me”, i.e. celebrate the Eucharist. This required somebody to preside, a leader. In the Acts of the Apostles we are frequently told of the “breaking of bread” (the preferred term then) but we are not given the identity of anyone who presided, Apostle or not. That does not mean the Apostles didn’t do so; it may have been felt not worth recording.
Nor can we say that the one who presided consciously looked on himself as a “priest” offering the sacrifice of Christ, rather as the priests in the Temple offered sacrifices of animals.
The first converts from Judaism tried to reconcile their Christianity with Temple worship, though they could hardly have been welcome there and in any case the Temple was destroyed in 70AD. And by the year 90AD at latest there had been a clear break with the synagogue, too.
Apart from the deacons [diakonoi] who had a ministry of the word and of charity, the first Christian communities took the titles of their leaders from Jewish tradition, but given Greek names: the episkopos – leader, overseer – and a council of elders – presbuteroi, literally ‘old men’. In time these last two would morph into the Bishop and Priest as we recognise them. In not every church was there only a single episkopos; in some churches the title was not used at all.