If you have an x86 machine available running any of a number of operating systems, you can grab a copy of Oracle VirtualBox and set up a virtual BSD machine. I have (or have had) Dragonfly BSD, FreeBSD and OpenBSD running in this way. Other BSD variants may or may not work.

You may well need more than one BSD system anyway, at least if your scope of work includes installing software packages. You may even need to feel around on the system to see which package management system is installed, just as you (presumably) need to do with Linux