Its really up to you when you decide your ready, but from the sounds of it you have a basic understanding and should gain alot from the experience. Also, in all honesty, there have been people who didn't really know how to use their camera who have attended Texas School and still walked away knowing more than when they came in.
Now given what you do know, you might want to look into one of the beginner or intermediate classes, should you want to attend. Look for a class that interests you, and that there is still space left in (some classes sell out in seconds when registration starts), and go from there. That is the approach I took. Hope this helps some. pm if you have more questions.
