Hi and hello,
I've been gleefully reading the "newbie" posts. Welcome aboard, Dave. Now, on the little matter of the Japanese (and Chinese) tea "ceremonies," I've got to agree with...I forget whom. Both ceremonies have their fixed elements, rules, regs, styles, and pretentions. Nonetheless, the age of getting your head chopped off for not towing -- toeing? -- the line are most likely coming to an end. So, it's safe to muck about with the ceremonies. When in doubt, make it up. But...do it with style...whatever that means.
On the subject of knowing about tea, therein lies an interesting idea/l. You could learn about tea until you're blue in the face, and not get it. You could drink thousands of gallons of tea and know nothing about it. Either way is fine, I think. Why not? But, given my druthers, I'd consider the latter the better: The tea will teach you all you need to know.
Michael