Kitten-Val (intrigueing name, BTW)
I would do two holes, were it me. Most dressage riders ride with their stirrups so long that they are fishing with their toes for them and the stirrup no longer can be used as an aid; to absorb some of the weight of the rider and for the rider to weight more one stirrup over the other, when bending or doing lateral movements.You will be better able to keep you leg under you, too.
May I respectfuly suggest you breathe. You look like you're holding your breather and tensing your shoulders up into your neck. Heck, sometimes I think I might faint from forgetting to breathe!
Breathing will help you to relax and drop your shoulders down. Let your upper arms hang down around your ribcage. Even think of actually dropping your elbow downward toward the top of your hips.
Eventually , you will start taking up a more meaningful contact with your horse and bringing his energy more upward rather than letting it all fall out the front end. In the photos he is totally "unstrung" but that is proably appropriate for where you are.
I only ride Training level, so I can only give modest advice up to that level.
I have really enjoyed many of your other posts.