Yes—go to https://copy.sh/v86/ and click on the 9front link. A session will open in your browser.

You'll notice that window management is quite different from what you're accustomed to, here's a brief guide:

https://pspodcasting.net/dan/blog/2019/plan9_desktop.html#ri...

Since no one replied regarding Inferno, yes.

https://www.vitanuova.com/inferno/downloads.html

9Front runs fine under VirtualBox -- just be sure to pre-allocate the whole virtual hard disk. (You only need a tiny one.) If you use sparse allocation, formatting fails.