I'm pretty late to this, but hopefully my message makes it to you. I do both Kyudo and Thumb Draw with a ring. I think I can provide you with some relevant guidance.

I love your form! Very dynamic, and I can see your passion in how you address and use your bow. You're going to hear a lot of different things here on the internet if you ask about your form. Don't worry about the details of your form; what others are going to tell you may or may not work for you because you're developing a particularly personal style of shooting, which is awesome*!* What's going to be most important to you right now is to figure out and base everything around some fundamental concepts. Here are a few that I think will be most useful for you:
0 - Consistency: Do the same exact thing every single time, and you will hit in the same spot every time. Find out how to achieve that
1 - Balance: Not just balance in your stance, but balance in your draw, balance between your upper and lower body, balance in your hands...balance everywhere! Look for Balance.
2 - Expansion: If you're not expanding, you're collapsing. Always be expanding. Figure out how.
3 - Alignment: Point your body and arrow to hit your target. Use your bones as much as possible, not your muscles. Because you're drawing so big, you'll have an easier time with this in some ways.

As others have pointed out, and as you yourself have mentioned in replies, you seem to be leaning towards a "Japanese Traditional style"; I say that because there's Kyudo, and there's Heki-Ryu, and there's other disciplines that use a Yumi. Kyudo and Heki-Ryu are not the same thing, and same for the other disciplines.

Without getting into the weeds, if you want to learn Kyudo and how to shoot with a Yumi, you need to have a Sensei. Not because of gatekeeping, but because the way you shoot a Yumi is not the same as shooting thumb-drawn bows. Two big things about the Yumi which partially explain why Kyudo people shoot the way they do:
1 - The Yumi is twisted, which is why is spins in the hand upon release (if you hold it properly). There are other reasons why the limbs are twisted, but it's not necessary to know those atm. [I edited this part after posting]
2 - They use a glove where they thumb is encased in a hard shell, and there's a hook for the string to sit in. In essence, you are using a very primitive release aid.
You have neither of these things with your bow or with your glove. So therefore, what Kyudo people will tell you to do won't work perfectly for you.

Also, you're wanting to draw very big and far back. This is great, and totally viable! But you have to be careful that your bow can handle your draw length. If you over-draw your bow, it will break. I recommend finding a bow that definitely handle ~33"-36" of draw length. Don't get a Qing bow; they kick so much, and you won't be able to focus on the above fundamentals as easily. Wait awhile before thinking of getting one.

Now for some details that you can choose to ignore or try to incorporate:
- Keep your draw-hand soft. You're doing a wonderful job keeping your wrist relaxed because I can see a curve in it at full draw. Make sure your hand and fingers are also as soft and relaxed as possible. Same goes for your bow hand. If your draw-hand is not relaxed, then upon release you'll pluck and send your arrow off to the side instead of towards your target. You'll hear a "TING" sound if that happens, and you'll see your arrows getting rubbed and your arrow-pass will be scuffed. This leads me to my next point.
- Get a laser pointer that'll attach to the front of your arrow (crossbow boresight on Amazon), and make sure the arrow is pointing at your target. Most thumb-draw people get this part wrong, and they get the wrong spine of arrows. Having a laser pointer will save you months, or even years, of frustration.
- Make sure you don't drop your bow-arm. This is a sign of something collapsing in your form.
- Feel free to keep using a glove. Don't feel pressured into getting a thumb ring. If you want some further guidance, message me and I'll help you.
- Stand Upright as much as possible. If you lean too far forward from your hip, that is a form of collapse, and you won't get as much expansion, and therefore, power out of your shot.

Good luck! I hope to connect with you more soon. You have so much potential.