I didn't like the sensation when first exposed, either.
I found repeated exposure to do the trick, aided by the attitude of an instructor that actually liked the feeling of reduced or zero "G". Don't force it. Just gradually build up your tolerance and acceptance of the feeling, by 'roller-coasting' the aircraft yourself, gently at first, more vigorously as you get the hang of it. (Always check for traffic, cabin security etc.)
Don't be surprised if, should you get a bit enthusiastic with the zero g, the engine loses power briefly, if it's a carburetor model. Float bowls and needle valves don't work properly upside down. Power will restore within a second or so of restoring any positive load.
Ginger capsules are a natural way to help prevent motion sickness, if that's a worry.