I'll start out by saying that learning to takeoff and land in a crosswind is not mandatory but optional. Were I fly the wind direction is constantly changing due to thermal activity. You can takeoff in a head wind and land in a cross wind, so in my situation it became mandatory to learn the procedures necessary to accomplish this task. It is all about trial and error and practice. One last thought is to include a cross wind runway when you layout your miniature airdrome and become proficient in the application of rudder.