I don’t know if I’d call it “easy” reading, but this is a well-regarded college textbook that’s popular in “Christianity 101” religion classes (so at least it’s entry-level and doesn’t assume prior knowledge on the topic):
I’m far from a religious scholar (just someone who enjoys history from time to time), so I’d be curious if other folks have additional recommendations.
I don’t know if I’d call it “easy” reading, but this is a well-regarded college textbook that’s popular in “Christianity 101” religion classes (so at least it’s entry-level and doesn’t assume prior knowledge on the topic):
https://www.bartehrman.com/the-new-testament-a-historical-introduction-to-the-early-christian-writings-4th-ed/
For something much lighter, Extra Credits did a video series on early Christian schisms that mentions the circumcision debate:
https://youtube.com/watch?v=E1ZZeCDGHJE&list=PLhyKYa0YJ_5BuNVhOt8Ls82Cr20yo6Y_p&index=32&t=1s&pp=iAQB0gcJCYQJAYcqIYzv
I’m far from a religious scholar (just someone who enjoys history from time to time), so I’d be curious if other folks have additional recommendations.