In 1861, she entered the Royal Danish Ballet School where she was taught by Georg Nicolai Brodersen (1819–1908).
[2] When she was 14, she was allowed to appear in Pas de Trois Cousines together with Betty Hennings who was to perform with her frequently.
[2] Tychsen had to fight hard for prominent roles as she did not exhibit the natural charisma of many of her colleagues.
She nevertheless progressed, succeeding in being assigned the role of Edvard, a naval cadet in Fjernt fra Danmark, in 1868.
These included the title role in La Sylphide, Eliza and Victorine in Le Conservatoire and Céleste in Torreadoren.