For more information, please see these links.
https://libersophy.blogspot.com/
https://www.reddit.com/r/Libersophy/
https://www.youtube.com/playlist?list=PLsus7xoQAU0pgpxEScC_9jKbD4uAbICxp
https://www.youtube.com/playlist?list=PLsus7xoQAU0qBRWWgZ4LnEnpEyIKqxKIi
https://www.youtube.com/playlist?list=PL916E17EE70E98A68
https://www.youtube.com/playlist?list=PLsus7xoQAU0r4ZoH1FS8mPjsdpLh1MM4D