As passenger:
Twotter flight from VGT to the Grand Canyon, with scarcely a cloud in the sky. Early afternoon, 30 degrees plus, crossing over water, desert, canyons & forest. It found it a real education in the different heat capacities of the respective surfaces. The missus just threw up.
(Talking to the FO afterwards, he put the turbulence at 4 on a scale of 1-10, with 1 being the mildest . . .).
As pilot:
My 2nd ever flying lesson, one grey December day, practising straight & level flight (!) in a C152, with none of the instruments, or indeed my control inputs, making much sense. My instructor described it as ‘moderate’.
I wouldn’t worry about your stomach too much – you very quickly get used to turbulence, and after a few lessons, you’ll barely notice it.