I really don't want to do much editing of my photos. My old camera, an Olympus D-460Zoom, is really an primitive digital camera. It doesn't have enough pixils for untouched photos to be uploaded. So, I don't think a little tweaking of the photos as "cheating" ...
I do have a newer camera, but by today's standards, it is still obsolete, but I like it and the quality of the photos. They often only need a bit of cropping and maybe some resizing.
I don't want to use the advanced features of a photo editing software. I want to learn how to make the camera do the work.
I'll look into digiKam. For now, I've just been using my XP for my photos and then transferring them over to the Linux computer.