Hello! I don't speak french, so someone else might be able to better communicate nuance in my response, sorry.
Your project is a cool idea, and I hope it goes well! I have a little advice- I have been a part of game design forums for a long time. In general, very few people will want to spend their free time (most of us don't have a lot) on an unproven project. If you work hard on your project yourself for a while, and then present your request for help along with proof-of-concept things like a basic demo, art, screenshots, etc., you are MUCH more likely to get assistance. Additionally, when you show that you're trying to get started yourself, people are often willing to help you out with the smaller problems you will encounter. For example, I wouldn't sign up to an unproven project to be the composer, but if you were trying to write a song and wanted advice or feedback on your work, I'd be happy to provide that!
Based on my personal experience, I would never commit to a project like this that the director hasn't been working on for a least a year. I've seen many, many projects start and become abandoned, I imagine lots of the people who could help you have seen that also. Generally when you ask for help like this, someone who has seen the abandoned projects will give you this advice, but nobody said anything over the past couple days so I thought I'd be that person, haha. So my advice is, get started yourself! Maybe in a year or so, people will want to join your team if nobody does now.
On a related note, I see that you started a project called Explorer: The Atlantis Journey a couple years ago. How is that coming along?
Best of luck with your project : )