Going from a hybrid body position to a road bike body position is a big change.
When I switched, on my new road bike i felt like i was falling forward on my face, all my weight was on my hands, my hands were going numb, my back hurt. The 2 bike people I trust said my position looked good on it.

We made big plans to change my 9cm stem to shorter 3cm, higher handlebars, seat forward, etc etc.
But before we had time to do all that, I rode for 2 months and found that my body started adjusting to the new position. Now 2 months later, I am lowering my handlebars, pushing my seat back, my hands feel fine and I find my muscles have adjusted so that they now distribute my weight more evenly over feet, seat, and hands. I am WAY more comfortable now.
I never did swap out for the shorter stem yet, which is sitting on the garage table gathering dust while I ponder returning it...
Unless you are in terrible pain, try riding it for a few weeks before making changes, and then change only one thing at a time.