How I overcame dizzy was
I dont stare at the plane all the time with
the background whizzing past, but learn to
watch the height of the plane from your
peripheral vision, when your eyes get tired
a few quick glances at the green grass will
rest your eyes.
If your plane is say 20 feet off the ground,
learn to keep it there without staring at it
constantly, even glance away for short spells
if you dont change your hand when you look
away ...it should still be 20 feet high when you
look back , then look away more casually as you
get used to it
This worked well for me in the early days, but
when I now fly inverted I get a little dizzy by the
5th lap
plenty of practice is good
Best wishes with it all, keep asking the questions here
Vincent