There are some really nice film simulations in Rawtherapee under the Colour tab and I would try this first. I personally really like the Polaroid ones.

Another great (and very flexible) option is the G'MIC plugin in GIMP. Go to Colours > Colour Presets and try some out. You can add and configure grain under Filters in GIMP. This might be a good option if you want lots of control and are willing to learn a bit.

Feel free to send me a message - I help people get up and running with free and open source photography software.

I use Libreoffice for all of my business admin, from invoices to pricing models. It's fantastic software.

Have a look at Debian. If you set up Flatpak with Flathub (very easy) you can easily install all of the applications you're likely to want with the GNOME Software GUI. Debian is a community distribution.

For jobs where you just want to make cuts check out 'Lossless Cut'. It's extremely simple and extremely fast.

GIMP is excellent software and I love using it. There are some great plugins coming out for the new GIMP 3 series too.

I had a similar thing. I started using Linux for privacy reasons and over the course of replacing all of the proprietary software I was using I fell in love with FOSS. Especially GIMP and other photography-related software.

Great exposure - I really like the 'paperiness'.

That's actually a really nice idea.

You can accomplish this with GIMP by removing all the UI panels (which it calls Dockable Dialogues) and tools from the toolbox, and then adding some of them back in. By default it starts off more complicated though, which I think is why a lot of people find it overwhelming to learn.

You've inspired me to do an experiment making a really simple and stripped back GIMP configuration. I can send you the config file if you want and you can let me now what you think.

Check out Shotwell. Its editing functionality sounds exactly like what you're looking for, although it is designed for managing a library of images videos.

Nice light!

I haven't used Krita much but found that the brushes were really nice to use.

GIMP is definitely a bit disorentating and complex if you've never used it before. After spending a couple of hours of proper study to get to grips with it though, the power and flexibility of it is awesome.

As with the recent Adobe/Photoshop news, I understand why this has been done and the sort of user that it's for, but FOSS graphics and photography software on Linux is so good now that I don't think this will have the impact it might have had a few years ago.