I have been modding this game for like 2 years and last time I posted here for advertisement for my mod Emperors and Deities I got downvoted for reasons beyond my comprehension and I felt weird so I deleted that.
But here I am, I am at it again and this will stay on. Great game, great modding capability and I make my ideal version of civ (WIP) right here.
fig.1. Policy Tree
fig.2. Civs(generalised to have unique in all eras. WIP)
fig.3. Tech Tree
fig.4. Some Units
fig.5. A ingame tutorial that gets updated every once in a while
I would need a lot of playtesting to iron out a lot of bad stuff and add more QOL features to make it fit.
The most simple method is to go into the mods tabs and download it. And provide feedback on either unciv's official discord or github of this mod.