I thought you looked great! Especially for being so new to english tack! Very natural! Noticed the position of your foot in the stirrup, which is tricky to get used to when you go from western to english. Play with your stirrup length a little, depending on what you want to do. Dressage riders keep a little longer length than hunter/jumpers. You might want to do a couple of strides of sitting trot before cueing for the canter...seems to prepare the horse and helps the transition be a little more smooth. Remind yourself to square your shoulders a bit more. I'm very impressed! You were born to ride English. Since you love speed you should get into jumping!