Good on you for being motivated to get in there and learn. My partner of nearly 4 years is finally caving to horses and has asked me to start teaching him as well :)
I wish when I had started, that I had the oportunity to ride a schoolmaster, and spend months on the lunge with no stirrups or reins, developing my seat.
I started out at a pretty dodgey riding school, then bought a pony with no knowledge, didn't have lessons for a year, and just hooned around at pony club. I rode lots of 'crazy' horses in that time as well.
The majority of Australian kids start out like that, hence we're a nation of top eventing riders. The dressage misses out as we never started out with that essential firm grounding of an independant seat, and once you've started training your body and mind to ride one way, it's very hard to undo that.
Years later, many thousands of dollars spent on professional lessons on good horses, I feel that I am finally on my way, but I very frequently have to remind myself while riding, when my body wants to go back to old habits.