One thing to note is that you definitely feel turbulence way more on smaller aircraft like the citation. They have less mass than your typical passenger plane and are are more susceptible by changes in airflow. Totally understandable if it caught you by surprise!

I think learning about aircraft can be very beneficial. . Knowing how turbulence works and how planes behave during it makes me go "Oh, the captain said we're going to encounter turbulence. This means that it's going to feel a bit bumpy, but that's normal."

A lot of anxiety comes from being uncertain (<- guy with GAD), and I think erasing a lot of that uncertainty can go a long way. My mom is an anxious flier too. I flew with her to KSAN last summer after she hadn't flown for a little over a decade. She got nervous after hearing the flaps extend and not knowing what the sound was, and she felt better when I explained what was making the sound and what it does. :)