That was exactly my experience. Tough and awkward at first. But since I was in a 60’s band playing plenty of Beatles tunes, I put in the time.I gave this a try just for fun once. This motion did not come naturally to me. First, I was using more of my forearms rather than mostly my wrist. That's the first thing I find awkward. Second, hitting from an angle back and forth was weird.
I'm sure if I worked on this for an extended period of time it would become part of my muscle vocabulary and something I could do automatically without thinking about it but this technique isn't something I feel a strong need to master.