just ride, ride the trot and canter, if it feels wrong it probably is, the more you do it, the more natural and balanced you feel. Play with stirrup length and balance, eventually you'll get in a groove, ride with one hand straight up, then the other , then both, Long as you are keeping the saddle between you and the horse, and the horse between you and the ground it aint all bad.
I have also had my horse magically disappear out from under me on numerous occasions. Don't think I have ever landed on my feet yet. But I am like BSMS, I'm just a dude, I learned to ride watching Yosemite Sam and Bugs Bunny, pretty much only know YAH MULE and WHooooooooo mule. Then hang on as appropriate.
There is no better trainer than a wet saddle pad.