blaze

Virtualbox is fine to test things out. In general, if you were to install it directly to your machine, it will run snappier than it will run in the virtual machine. Just saying if it feels laggy in Virtualbox, that doesn’t mean it won’t work.

For ISOs just go to the website of the distro you choose and look for ‘Downloads’. Usually there’s an ISO that’s been optimized for Virtualbox.

Maybe it’s a reference to menstrual cramps? Just a guess