Complex sentence: However, Njegoš himself had been sufficiently strengthened by his visit to Russia and he quickly moved to push Vukotić aside and he installed instead his own brother Pero as the leader of the Senate, with Njegoš's first cousin Đorđe as Pero's deputy.
Split into simpler sentences: However, Njegoš himself had been sufficiently strengthened by his visit to Russia and quickly moved to push Vukotić aside. Njegoš then installed instead his own brother Pero as the leader of the Senate, with his first cousin Đorđe as Pero's deputy.