BSD based operating systems work fine for a lot of things. A huge majority of people only use their computers to browse the web, write documents and read their e-mail.
Something like GhostBSD would work perfectly well for this, though afaik GhostBSD is just FreeBSD with a different default configuration.
Though you are not going to be able to do much that involves proprietary software, like playing video games. Unless you use Wine or a proprietary BSD based operating system like that of Sony's or Nintendo's game consoles, or Mac OS.
I'm actually thinking about installing OpenBSD on my laptop, though I would not recommend doing this to anyone who just wants to stop using Windows.

CC: @jaypatelani@lemmy.ml