If on VBox download and load extentions into VBox and after Mint installed install guest additions.
sudo apt install nala -y
sudo nala fetch
(add top 10)
Installing deb packages
1. open terminal in the folder containing package.deb
2. sudo dpkg -i package-name.deb
try inter font
system settings has transparent panel option
sudo apt install ttf-mscorefonts-installer