So, your primitive house church has no actual statement of faith that is believed?
best.
.
The funny thing about creeds, and statements of faith, is that they are man made, and thus error is always possible.
This is how the big churches end up going astray. They may start out on the right foot, but a little tweak has to be made for this or that, and then later another, and pretty soon you have something that the people love, and it begins to replace the scriptures.
If someone rejects the preaching he hears, eventually they either argue to try to make a change, or they just leave.
This is why James called in Acts 15:21 for the believers to go to their synagogue EVERY Sabbath day to hear the scriptures read. One may argue with a sermon, but it is harder to argue with scripture.
Reading the Acts, it quickly becomes clear that all that they did revolved around the Sabbath meetings where the newcomers learned by hearing. As Paul said to the Romans, “faith cometh by hearing, and hearing by the word of God.”