Stephen Kenny's Ireland U-21s side are set to take on China U-22 in their opening Group C fixture at Stade de Lattre de Tassigny, with kick-off at 2.30pm (3.30pm local time).
Idah enjoyed a fantastic start to U-21 life in his first appearance with the group when he notched an impressive brace in March's 3-0 win over Luxembourg at Tallaght Stadium in the UEFA European Championships qualifying.
The Norwich City forward is set to play an important role in the Toulon Tournament for Ireland and the former College Corinthians man can't wait to represent his country in the prestigious tournament.
"It's always an honour to represent your country and to be selected for the tournament is incredible, and I'm really looking forward to getting started," said the 18-year old.
"It was a great experience for me to come into the squad in March and I was delighted with the way I started for the team. I'm always confident in my ability and it was great to score the two goals.
"It's now important I push on and take the chances I've been given. It's going to be a tough game and a tough tournament for us, but it will be a great opportunity for us to show what we can do and bring that into the games in the European Championships qualifying."
China U-22 are currently preparing for their Tokyo 2020 qualifying tournament in January next year and the squad, who are managed by Guus Hiddink, have already played 13 games since September 2018 in preparation for the tournament.
China are set to be slightly older than the Ireland U-21 squad, with a number of players in the Irish squad promoted from the U-19 side, but Idah doesn't believe the age difference will be a factor in the match.
"We've got great belief in the group and training has gone really well since we met up on Tuesday. We played the senior team on Thursday and it was good to get those minutes, and we did really well and competed," continued Idah.
"We're not thinking about them being older than us, we're confident in our abilities and we've got a lot of talent in the group as well so that's what we need to think about.
"We're really looking forward to it, it'll be difficult with the conditions as well as it will be very hot, but we're ready for the challenge and can't wait to get started."