You can install FreeBSD on an external disk. The FreeBSD Handbook answers the other questions. Source: about 1 year ago

I have an veeery old notebook (Toshiba tecra s2) and wanted to give this machine a new life. Learning about unix and so on. Are the docs on https://docs.freebsd.org/en/books/handbook/ a good start for this? Or does someone has any recommendations? Source: about 1 year ago

In the official handbook read chapters 1-5, 13, & 19 to get oriented. Source: over 1 year ago

The system that exhibits the best software engineering in its development and in the software packaging process is undoubtedly FreeBSD -- it wouldn't hurt to look at it more carefully. I build all of my desktop (Gnome/Plasma/XFCE) and math and programming languages / editors from source code on FreeBSD using the latest stable operating system release (13.1, soon to be 13.2). See the FreeBSD Journal to get an... Source: over 1 year ago

I'd suggest not doing any searches, and just using the default documentation. The handbook is what drew me to FreeBSD nearly two decades ago. Not random documentation from different users trying to accomplish the same thing in multiple ways often with little regard to security or functionality. The Handbook isn't without flaws, but it is a excellent unified documentation that covers every basic topic. Source: over 1 year ago

I'll update this if I find more. For now, this seems to be a partial solution. It's a Gmail add on (except I don't use Gmail) that adds reminders. The options when setting reminders include cancelling it if someone replies, and to remind everyone in the thread. If you combine those two, it seems like — if you use Gmail's web client and have $23/month you're dying to get rid of — a decent way to add the feature. Source: over 1 year ago