digiKam in a dual-boot system?

[Carsten Fuchs]

Dear digiKam group,

I'm new to digiKam, and first of all let me say that I find it 
*awesome*! I love it very much and it is a huge joy to use it both under 
Windows and under Linux!

That already brings me to my question:
Having installed digiKam 5.1 on a dual-boot machine with Windows 10 and 
Ubuntu 16.04, I'd like to share albums and databases under both systems.

I've not yet tried this, because I don't want to mess up my fresh 
installations and database, but obviously under Windows we have 
different paths to the database files and albums than under Ubuntu. 
Checked the docs, FAQs and mailing list archives, and found loosely 
related, but no applicable solutions.

What is a good way to approach this?

Any hint would very much be appreciated.
Many thanks and best regards,
Carsten