Bottom line, if the wind is making you uncomfortable then stay on the ground. That being said, the only way to build skills is to practice and that includes flying in the wind. The one thing that has not been mentioned yet is airplane set up. 80% of airplanes I see at any flying site are not flight trimmed correctly. This leads to an airplane that reacts more to airspeed changes ( wind ). Once an airplane is trimmed correctly meaning the CG, thrust angles, incidences, aileron differential, throws, expo. Then it becomes much easier to fly in less then ideal conditions.