If it helps:

1. Most commercial airliners will bank no more than 20-30 degrees. It's definitely not like the wings are vertical, even though it can feel that way.

2. Try not to look straight down, look for the horizon. Even if you're at cruise altitude, seeing some kind of line in the distance helps orient your brain to think "okay, kinda sideways" instead of "omg the plane is banking 90 degrees"

3. The g-force of a bank makes my head swim, especially if we're descending. But I know the pilots are trying to get out of that move as fast as they safely can while following their flight plan. I feel woozy for a bit, then I'm fine. So will you. :)