Thanks Magic Banana
Yes, I did attempt to "install Trisquel on the USB drive where the running
live system is" - Okay, I won't do that again. Good to know.
Apertium and other Apps in repository will be installed after Trisquel - I'll
wait for the arrival of my Trisquel laptop, while I read bash tutorials, and
the details from FSF to maintain my free source GNU Laptop.
Staying away from SaaS and Mono requires awareness and intentional focus to
form new computer habits.
Thanks for the friendly support!