Hello. Thanks for mapping.
We welcome you as a new mapper.
Difficult area to map here.
Unfortunately, many buildings are not aligned to their footprint or incorrect mapped.
About mapping of high buildings.  They show a large shadow.
Difficult area to map.
Big building blocks with several stories and courtyards

Check here how high buildings ought to be mapped.

https://docs.google.com/document/d/1z7uDwYm4oNmlexHIhJxGCjPpNhCQAgRia5aEJr_4MwM/edit?usp=sharing

Many tall buildings have a small building, a superstructure, lift building or something similar on the roof, do not map it as a separate building, just map the roof lines of the complete building.

Best regards and keep mapping 