My personal way of dealing with air sickness before i 'grew' out of it was
1) Those acupressure wrist bands-worked a treat and when i got used to it all i threw 'em away.
2) eat something a maybe 2-4 hours before hand and be well hydrated.
3) plenty of fresh air
4) Mints are excellent-just dont ask me why!
5) Those ginger tabs
6) Eyes outside as much as possible - only very quick and occasional glance at the instruements, after all it is vfr flying. And if possible do as much flying as possible, and during each lesson maybe ask do the first 5-10 mins yourself just doing whatever(climbs,descents turns etc) before intsructor starts demonstrating the next set of exercises.
Hope that helps and remember it will pass with experience
Ps be well rested and defo not hungover