@Tacitus_Kilgore you willing to explore Linux OS?
@Tacitus_Kilgore you have a 15 year computer that you can practice on. You have nothing to lose and a whole lot of learning to gain...never too old too start or not gifted enough to begin.
@Tacitus_Kilgore In 2000, I tried to get Linux going on my computer and gave up.
In 2010, I tried again, and it was easy-peasy. I admit, that in the 15 years since then, I had maybe five problems, but I was always able to solve them with StackOverflow. No serious event in the past decade.
@Tacitus_Kilgore So, I would give it a go. I run a Windows Linux dual boot, meaning, you still have Windows as a fallback, while Linux can share Firefox/Thunderbird/XYZ profiles with Windows, so you have always the same status of these programs in both installations. @Victor
@Tacitus_Kilgore And this is the advice of a nontechie. @Victor
@Victor My understanding is you have to be more technically versed to run Linux. I'm not that great at understanding that stuff.