Darktable is the best photography editing and classifying software I've ever used. New users should be warned it's quite power-user centric though. Adopting isn't like opening up Lightroom and messing around. You may have to read a bit of documentation regarding the modules and different workflows (i.e. Sigmoid vs FilmicRGB).

I think the Ansel developer has a YouTube series with tutorials on how to edit in Darktable using the Filmic RGB workflow. Not sure if that's where I'd get started nowadays (I've just adopted Sigmoid and it's way quicker to edit with it), but it gave me a solid base in how to use this software.

Darktable is another piece of software that really shows warts in UX.

For example, you can right click empty space to "remove" or "update path to file..." in the left hand rail. There shouldn't be a right click option in empty space.

Everything lower case makes it very difficult to quickly parse, especially the settings menu.

Inkscape is also full of these sins. For that matter, so is KDE.

I tested literally all alternatives to Lightroom, including even other commercial Windows only software, just because I want to get off the subscription. I tested two specific functions I use and need, and zero of all other programs do them well. It's frustrating.