When I started learning I used the pinch method because I saw a lot of other people do then my instructor told me to move the stick up and down then left and right with the pinch method.(on the ground). I could not move the vators with out moving the ailerons, so then he told me to use my thumbs and then I was able to move the vators with out the ailerons and then move the ailerons with out moving the vators and so on. My instructor help a lot by doing that test so it is something you might want to try.

rc-plane