I found Androidx86 and boot it from USB. Didn't try it in a VM.
But if I look at https://www.google.com/search?q=androidx86+in+virtualbox it appears folk have it working.
I tried to install android6.0-r1 64bit on following PC
Created a VM to test run Android.
Name and operating system
Version: Other Linux (64-bit)
Memory size 5120MB
Hard disk file type VDI (VirtualBox Disk Image)
File location and size 16G
Video Memory: 32MB
Started Android on VM. After selecting Language it came to a screen (unfortunately I couldn't attach the file here)
I couldn't proceed further, no key having function. Mouse pointer didn't work on the screen because VM guest addition haven't been installed.
Advice would be appreciated. Thanks in advance.