You can figure it out. Locked elbows, try a slight bend. That's where your core muscles come in. I would try forcing yourself to ride the drops, a little bit at a time, then more and more. Let your upper body go down, let your elbows flex.

You can always flex them on the hoods and tops too, so practice it. Droop those shoulders.

Really good opportunities to practice are riding into the wind, and on turns you want to take fast, the first to reduce wind-drag, the second to lower your center-of-mass. If you can find a route with twisty turns, that's really good to get low.

You should also get out of your saddle a fair amount. I'm an old fart, I'm mostly heavy-seated, but often, I get off. Like at start ups from intersections, some climbs, to sprint.