There are some issues installing VirtualBox 6.0 that's not in the basic Ubuntu repositories. Easiest install is from the software center or apt-install.
$ sudo apt install virtualbox virtualbox-ext-pack
Getting USB Support to Work
Refer: https://www.techrepublic.com/article/how-to-enable-usb-in-virtualbox/
- Install the extension pack on the host and on the guest
- $ sudo usermod -aG vboxusers mruckman
- Reboot