During Windows millennium days, I accessed internet mainly from internet cafe's, most of them had windows restrictions enabled, with downloads disabled, my computer hidden and such.
Open notepad, and from notepad I access USB drive then run opera browser installed on it. mail, web, downloads..
I had a similar journey, settled on a todo app that actually uses text files too
https://www.taskpaper.com
Save the text file to a cloud sync provider and you can check it on every device