Logic Problem

Hi! I want to use mycloud home with the desktop app on two dekstop computers to share work.
Both PC have the app installed.

I started to synchronize the folder from my local pc to the my cloud.

Now how does this work?
Will it synchronize automatically from my local folders? Do i have to copy files in there? What if my partner on the other PC changes something in a document, will it change on the cloud too?

What is the best way to set this up so two people can work together on the cloud. Does it make sense to work directly on the mycloud or better work on local storage and then synchronize? As the mycloud is connected to my pc via ethernet and to the other pc via wifi it should be ok to work directly in there without being slow right?

Thank you!