What did the original Christian writings look like during the 1st century CE? It is said (from what I've read), from a few Google searches related to "when was the new testament first written", that the New Testament was written down somewhere between 30CE and 150CE, rough ballpark. Wikipedia says the phrase "New Testament" in Koine Greek (the original Greek dialect it was written in) is pronounced "Ἡ Καινὴ Διαθήκη", which was used "to describe a collection of first and second-century Christian Greek scriptures ... traced back to Tertullian in his work Against Praxeas." By the 4th century, there was a canonical collection of the New Testament texts collected. By the 5th century, a Latin translation of the New Testament was created. These first complete Bibles were written in the Uncial Script.

By my question is what happened between 30CE and 300-400CE? What were all these fragments of Christianity referred to casually as the "New Testament" written in? What sort of punctuation and formatting did they use? Was it all in Koine Greek? Even so, what did it look like is my main question. Was it all written by scribes who used the Uncial style? Or did the scribes have other fonts/typographic styles they used?
The earliest Biblical manuscripts were almost certainly written on papyrus. We know of over 130 Biblical papyri dating from the second to the eighth century. These were written in majuscule case, and I think usually without spaces or much punctuation. They were not written in the uncial script as it was developed only in the fourth century for use on parchment and vellum, not papyrus.