Morgen!
There are many good distros.
Previously, I used Ubuntu for many years
and never had any problems with RawTherapee,
darktable, or The Gimp.
Presently I am on Manjaro (which is a so called rolling distro,
always trying to serve you the latest versions).
I believe that Mica is on Debian stable. Or at least was:
In order to decide which distro works the best for you: why not
get a USB stick (with about 4 gig capacity), load it with a “live” distro,
boot from the USB and try it before you install it?
Have fun!
Claes in Lund, Zweden