Hi Rene,
I've just been looking at the same issue. I eventually want to measure variable stars with a DSLR but to begin with I'll take a few 'happy snaps' to get used to the gear and processes. So my comments are not based on experience, just investigation. I use Linux on my desktop and I found a program called
Siril which stands for 'Iris for Linux'
Iris itself is Windows freeware which has a very extensive set of features, however I'm not sure how much development is going on. Meanwhile Siril is certainly being developed and it is now available for Win and iOS.
What looks hopeful to me is that Siril can use scripts to automate processes and it comes with some built in scripts (Linux users have to download manually) which can be modified or new ones written from scratch. You can do more advanced automation via DOS or bash scripts or with pySiril but that's all above my level. They have some
tutorials and a youtube channel but I sort of like some of the third-party videos. A good intro is
here.
As I say, I'm a newbie myself and don't really know if this is any better than other software but it looks good to me. I am interested in any feedback from more experienced imagers.
cheers,
David