Nnadozie, who was in goal in the Super Falcons' 8-0 friendly loss to France in April 2018 starred at the Fifa U20 Women's World Cup in France but could not take her side beyond the last 16 round.
On the back of her excellent display, the Rivers Angels prodigy made the country's squad to the 2018 Africa Women's Cup of Nations but did not play a part in their triumph in Ghana.
In May, Nnadozie was named the tournament's best goalkeeper as the Super Falcons won the 2019 Wafu Women's Cup in Cote d'Ivoire.
On Wednesday in Grenoble, the 18-year-old made her debut in the team's 2-0 win over the Asians and became the youngest ever player to keep a cleansheet in a Women's World Cup game.
And she is proud of her incredible career's progress so far and believes her side can upset hosts France at Roazhon Park in Rennes on Monday.
"When the coaches drew the Women's World Cup final list, I was so happy to find my name on the squad," Nnadozie told Goal.
"It was a dream come true for me. I've long desired to have the experience of playing at the senior World Cup because I've already played in the World Cup at the junior level.
"I wanted to know how it is like playing at the senior World Cup and I'm really grateful to God and the coaches for giving me the opportunity to be here.
"I am so happy to have kept a cleansheet in my first game and also made the record as the youngest to do that. Before the game, I was a bit scared when I saw my name on the starting line-up.
"But the coaches and my teammates encouraged me to be calm and focused. I'm happy all went well and we got the victory we needed. This will motivate me a lot.
"I knew it was going to be a tough game because they lost their first game [to France] just like we did. I'm glad that we implemented what the coaches taught us and we came out strong and won.
"Our next game is against France, I know it's not going to be easy but we are all ready. If we can play our hearts out and stay united like we are now, we can get a good result against France."
With three points from two games, Thomas Dennerby's ladies will be hoping to claim a knockout stage spot with a good result against Les Bleus.