Struggling with storing text on btree-rope, looking for guidance

Hey, I am not an experienced dev in low-level concepts. My background is many years of writing backends mostly in Python. I am struggling with goals I established for my own project. I wrote (all by hand) a b-rope structure to store text. My goal is to write a b-rope (something similar to GitHub - cessen/ropey: A utf8 text rope for manipulating and editing large texts. · GitHub), that has the following: more or less const insert/delete predictable time, not dependent on structure size smal...