What did you learn?
Arraymesh, mesh generation in general, more about how noise works, normal calculations, etc. i defnitely think that just calibrating everything is the hardest part, i wanted to have like islands but i can't spend more time on this project rn. i'll def come back though and add the things mentioned ingame

How did you improve the terrain?
i did, yes, achieve most of my goals, although if you look at the ingame "thingsimightdolist", you can check out some that weren't actually completed.