Complex sentence: Born Helena von Hahn to Russo-German aristocratic parentage in Ekaterinoslav, Russian-controlled Ukraine, Blavatsky traveled widely around the Russian Empire as a child, being largely self-educated, and developing an interest in Western esotericism during her teenage years.
Split into simpler sentences: Born Helena von Hahn to aristocratic Russo-German parentage in Ekaterinoslav, Russian-controlled Ukraine, Blavatsky traveled widely around the Russian Empire as a child. Largely self-educated, she developing an interest in Western esotericism during her teenage years.