Getting started with emulator I'm sorry that this is almost certainly one of those "read the docs" questions, but I've been trying to do so for a while now, and my head is spinning. I suspect what I want is impossible, but would appreciate if someone can confirm/deny/point me in the right direction before I tear any more hair out.

I want to start to tinker with Android and determine whether I want to learn this environment or not. I have installed Android Studio on my Ubuntu Linux 18.04 primary development machine which has 32G RAM and an I7-4790 processor. However, I also have VirtualBox running and it's not an option to shut that down. Consequently, the emulator refuses to start.

My investigations then came across "genymotion", but their website seems to indicate that even a single dev license is over a hundred bucks a year. Am I right about this, or are they merely hiding a community edition somewhere? I'm not willing to pay for the tools at this stage of discovery.

So, my specific question: is there a zero money emulator that I can use on Linux, concurrently with VirtualBox?

EDIT: I took advantage of the need to do some upgrades and took VirtualBox  down for ten minutes last night. I succeeded in proving that the emulator and the AndroingStudio installation work perfectly under these conditions.
Yes, in fact Android absolu has an emulator called quemo  There are a couple of  beautiful things about quemo. For one you just need to use your 
Linux machine to Git clone it in. Second, it is from the Android Google source code and you do not need to download Android Studio.