Termux is awesome! I use it for a bunch of things:
- sshing into servers and my home when I’m out and about
- using croc to transfer files
- making videos I’m going to send people smaller with ffmpeg
- downloading stuff with yt-dlp
- giving myself access to the sandbox + /sdcard from other computers by running an ssh server
- scripting phone stuff (like taking photos) with the api
- running weechat locally, which I can then connect to with weechat android
- using vim
- probably a bunch of other things I’m forgetting
I’ve been using gimp’s 3.x branch since 2016 or so (after getting a hidpi display) and gimp itself since the early 2000s, both for personal stuff and for work. I’m typically editing existing photos and images to clean them up, apply effects, make new clean images from pieces of existing ones, etc, and for my uses it’s great. Also, having been using it for so long, I actually really prefer the ux to Photoshop (especially since they added an option to use it in single window mode).
I’ve seen videos showing some of the features it’s missing for certain types of things though, and while there are hacky scripted ways to emulate them, you might find it lacking if you’re expecting those particular features.
I’d recommend looking up tutorials on YouTube for things you frequently do and see how much work it is and what the final product looks like. You could up the playback speed to save time since you won’t be following along with gimp yourself.