Experience on migration from server to cloud (Sharepoint/Teams)?

Hi,

I dont know if this is the right forum, but I was wondering if anyone here has experience with migration from a local server to a cloud solution, preferably Sharepoint/Teams? 

Because of limitations in link length and symbols, we are not able to migrate our server as is, and have come to the realization we have to rename and restruckture A LOT. 

We work as a creative inhouse department in an international retail chain.

Any best case examples and pro tips would be appreciated!