User friendly guides for understanding Windows/MacOS/Linux system error logs?

While sometimes logs aren't too difficult to follow, there's also often times they're inscrutable to those not in the weeds of their respective OS. So I was wondering if anyone around here might have some pointers to guides or the like for where to find, and help understanding, different system error logs.

On Windows there's Event Viewer to some extent, and on Linux I think it's typically /var/log (and some distros may have a GUI System Log Viewer?). Not sure of MacOS.

Thanks in advance for any replies with pointers to resources!