Trisquel is a fully free OS, which means it contains no proprietary software, including drivers etc. Is there any reason to believe that it will run on a Yoga c13 (Morpheus)?
If it will run, I suspect that the wifi adapter will not work. Which other functions will probably or certainly not work?
Since it won’t have non-free drivers but also will lack non-free firmware, it seems to indicate that usable graphics aren’t supported, and possibly audio.
Probably, but it might take some research and effort.
Debian’s documentation may provide the info you need, plus they have install options for a fully-free setups so this info could be used on Trisquel.
Is it worth the effort? I personally don’t think so, but at the very least it will be a good learning experience.
My purpose is to get the freest possible machine which at the same time is ‘fairly’ modern (i.e. not too slow and not too chunky, decent screen resolution etc) and can function as a tablet (which I need for my work).
But since I am not myself a tech savvy, it may indeed not be worth the effort.
But may I ask you why you don’t think it will be worth the effort?
The amount of time and effort, plus the trial and errors to get those things you just mentioned will be quite hard, if not impossible, Particularly good screen resolutions, usable video playback, and tablet usage.
By the time you add all the firmwares you need - likley via packages that include more than you need, unless you try do manually install and manually configure everything – you might as well start with all the things you need at hand.
You might have an easier time looking for guidance on Trisquel’s forums and documentation to find a much more supported device - Intel platforms will likley be a bit easier, particularly with graphics , thus having fewer things to figure out.
Now, the worth of the effort is purely my own opinion, but it will take a lot of effort, more so for a new Linux user. It well may be worth it to you, and you will learn a lot of technical things and become familiar with the command line, more so than most these days.
I don’t get why you would want the os to be free of non-free firmware when coreboot itself is full of proprietary blobs that are needed for the system to boot.