What finally worked for me, was to look at the front, fixed end of the yaw string and treat it as if it was a slip ball i.e. push it back to the centre-line with the appropriate rudder pedal.
I always think 'foot into the gap' ie put a boot into the biggest hole.
Give gliding a go, it has it's frustrations but for one the view is magnificent, a quantum leap above what you will be used to and it requires more pure flying skills than powered. Think of sailing a yacht and driving a powerboat.
I would add the caveat that personalities are important at gliding clubs. At a powered club you spend (unless you choose to) far less time with the membership whereas at a GC you may be spending all day with someone that you wouldn't urinate on if they were combusting. It can try your patience at times as any club of any pastime will have the 'club fathers' who reign by divine right. Mind you, I've been a member of a powered club that was just the same.