Ninua was born in Tbilisi on June 22, 1999. His talent stood out from an early age and he soon joined the youth academy at Dinamo, while at the same time from 2014 he became a Georgian international with his country’s youth teams.

In November 2016 he was elevated to the first team squad and gradually began to find a role for himself. He made his debut soon afterwards, and by the end of that season he had already made 18 appearances, while on June 17, 2017 he scored his first professional goal.

He gradually became an integral part of the squad and, despite his young age, he was even given the captain’s armband. His big breakthrough season came in the 2018-19 campaign, during which he scored eight goals and provided 11 assists in 37 games.

His overall record at Dinamo reads: 95 games, 14 goals, and 15 assists, while he also celebrated two Georgian league titles, and became a key member of the Georgia Under-21 squad.