Joomla Related Training! Is PHP, MySQL, or Flash Helpful?

I'm a bit paranoid about looking under the hood of my Joomla testsite. Would reading a book or taking an intro course on things like PHP and MySQL and Flash be helpful if I want to have the confidence to change my templates or one day create my own templates?

Steve, I've been reading how sometimes you tell folks to change their .ini file or whatever... and I'd like you to suggest what I can do to get more comfortable working with code like that. I'm not interested in creating modules or extensions for Joomla use, only interested in feeling confident about going in behind the scene and making changes. I also have this weird idea that if I built my own templates, I'd know where everything was and how it worked, BUT, I've got to get to that place first. Will your upcoming tutorials on "Templates" help me overcome my fear of breaking something?

Please excuses my many questions, but I don't yet understand how all these things work together.

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