rofl, sorry, not fair on a first post, but you had to be a model didn't you?! Couldn't just be a normal person looking for help.
Anyway, search on Google for "php tutorial" and follow some of the simple examples to get you started. Your myspace experience will have taught you basic html and css skills. That's a good starting point.
PHP is just another way of generating that html and "view source" will be an important tool as you get used to the difference between the script and what the browser receives.
MySQL (or any database) is just a way of holding information. Study the tutorials carefully and be ready to make many mistakes as you get used to how tables tie together etc.
Oh, and you need a site to play with so you'll have to sign up for a proper hosting package.