you are doing quite well for the limited amount of time you've been able to have in the saddle.
I notice that your toe point outward too much , especially with the right foot, and you may be gripping upward with your calf.
I would suggest working on the lunge line at canter, drop the reins, really relax and allow all your weight to be in the saddle, and flowing down into your legs. Melt into the horse instead of gripping on top of it.
Like I said, you are doing pretty darn well, and I often have the same problem (of gripping up at the canter).