I flew to France and back a couple of days ago.
I can honestly say if you had shut your eyes you wouldnt have know you were flying. More often than not that is the case.
You will find on any day there is usually a height at which you can fly where the air is much smoother. Remember that as it is seldom explored during PPL.
BBTW as others have said the motion of a little light aircraft the first time will be very different. We tend to become accustom to much larger commercial aircraft which inevitably ride the lumps and bumps better. Almost certainly you will get use to it. If you pass your PPL you may move into something a little larger and heavier which will also give a more solid ride.
Enjoy!