...I'm not certain "bending down more" is exactly what I meant. If your back hurts when you ride this, there's a very good reason for it. And if your back hurts every time you ride it, you won't ride it much. there are a whole complex of muscles and ligaments involved in your hip and pelvic regions.

If you are doing anything for the first time, you often need to discover what your body is capable of, and sometimes how to improve on that.

So for assuming a proper road position on a bicycle with drops, there are some areas that you will probably need to stretch regularly to improve flexion. There are a lot of recommended stretches for cyclists pages floating around on the web, and yoga will definitely clue you in on how far off yoga normal you are in the tight places. I personally have lifetime issues with the psoas muscle. It's my personal cross in life.

Anyway the general "feeling" you want to encourage is bending from low down, in the hips. And keep your back relatively straight, sometimes even reversing the curve so you are stretching the spine a little in reverse curve, not a forward curve.

Your current body position in the photos will continue to cause back pain, if I had to guess. But yes..adapt gradually to this new endeavor.