There are many people who have so much trouble with Virtualbox ,
it's really not hard. I've been using it for years, I've found the best way to learn is by watching videos from people who know what their doing.
Here are a few videos from a guy who makes it so easy to understand, the videos are old but good.
The other day I installed in Virtualbox 6.0...Linux Mint Cinnamon 20.2 and Linux Lite 5.4.
All have both Guest Additions CD and Extension Pack installed, I also have a Shared Folder and Drag and Drop too. I'm no expert, I'm an average user...so if I can use Virtualbox as shown above, anyone else can too...hope this helps.

Here are a few videos from a guy who makes it so easy to understand, the videos are old but good.

The other day I installed in Virtualbox 6.0...Linux Mint Cinnamon 20.2 and Linux Lite 5.4.

All have both Guest Additions CD and Extension Pack installed, I also have a Shared Folder and Drag and Drop too. I'm no expert, I'm an average user...so if I can use Virtualbox as shown above, anyone else can too...hope this helps.
