Joe,
It is my opinion you need to decide if you really want to shoot this style. It is great fun, and you will enjoy it thoroughly!
Find yourself a used bow, and give it a try. When I first learned the thumb ring it was with an old bear 100% fiberglass bow that I had to rework the handle. It had a shelf on it. It was 45#. Paid 35.00 dollars for it, and it was impressive how it would throw a full length carbon arrow.
It made an impression, because to shoot the bow with fingers, and then shoot the bow with the ring was a world of difference in performance. Then and there, I was convinced of the virtues of the ring.
You should really ask yourself what are you looking for in traditional archery? Are you looking to shoot aspirin out of the air, or are you more concerned with a more "traditional" technique and approach?
What you decide should have an impact on the equipment you choose.