Complex sentence: In 1922 he started writing for the Armenian publications and took a pen name because he feared the stigma of rejections, and at age 22, Aram Chekenian became Aram Haigaz.
Split into simpler sentences: In 1922 he started writing for Armenian publications and took a pen name because he feared the stigma of rejections. At age 22, Aram Chekenian became Aram Haigaz.