CSS : Cascading Style Sheets.
HTML : Hyper text markup language
CMS : Content Management System
cPanel : Web panel manager used by any good host
Fantastico : It installs scripts for you, so you enter a username and password and it automatically installs instead of you manually doing it.

Sites like http://tizag.com , http://w3schools.com , http://php.net , http://csszengarden.com , http://cssmania.com , http://pixel2life.com etc.

If you don't understand a term, then if you just go to google and enter "Definition:<TERM>" you will get a result

If you Don't have access to cPanel and want to use fantastico - PM me and i can set you up with a free hosting account to try everything out