Jesus did not start ANY church.
He was always Jewish.
His followers started churches after they were kicked out of Judaism. Some of those churches became the Roman Catholic Church; others the Syrian and Ethiopian Orthodox Churches; still others (in India) the Mar Thoma Church.
The Greek and Eastern Orthodox split from the Roman Church around 1000ad the Protestant churches began to split off in 1517.
ALL who follow Jesus no matter what their particular church is called are part of the continuous tradition stretching back to the disciples.
The foundation of Christianity is Jesus’ own Jewish wisdom teaching and if the disciples hadn’t been expelled from Jewish worship and study spaces we would still be just another denomination of Judaism. I’d be ok with that, but that’s not what happened.
Peace,Kryssie