Hi Ray
Go to
https://www.skype.com/en/get-skype/
From the drop-down on that page, choose 'Get Skype for Linux deb'
Once that has downloaded, open the terminal, run this command and hit Enter
cd Download/
Run this command and hit Enter:
dpkg -i skypeforlinux-64.deb
If you encounter an error, run this command:
apt -f install