I have problem. I correct the aileron the wrong way at takeoff

I concur with the other postings for windy day practice. It is a
great reflex builder.

You may also consider some training flight with an instructor doing
"un-assisted" takeoffs (no wing runner). It seems that this skill is
no longer part of the typical training syllabus, but is a good way to
get used to the control inputs required to steer the glider (feet/
rudder) and simultaneously pick up the wing dragging on the ground
with out over controlling. When you can complete this task in a
smooth coordinated manner, you should have no problems dealing with a
wing drop.

Hang in there! Wings drop The causes of a wing drop are many and most
are out of your control. Your focus should be on early recognition of
the problem and a timely and appropriate corrective action.
Todd