Enderlein competed in five races in the winter of 1961 to 1962 and finished fifth at the German Junior Championships. She debuted at the FIL World Luge Championships 1963 in Imst, but achieved only 24th place after a fall, while her teammate Ilse Geisler won. A few days later, Enderlein finished second behind Geisler, at the international event for the "Ehrenpreis der Stadt Innsbruck" on the newly created Bob-Rodel Igls run in Innsbruck-Igls. Her first major win in a national competition was at the GDR Championships in Oberbärenburg in February 1963; Helga Meusinger, who had previously won at the European Junior Championships in 1961 and 1962 finished second, while Ilse Geisler did not reach the top three because of two falls.