Hi @Gwena_Jaouen,
What an interesting project!
I'd recommend the following:
- Retool recently launched its own university. I can't say anything about the content as I haven't had the time to go through them, but I'm hoping they are beginner-friendly
- I've done some beginners tutorials in this youTube channel https://www.youtube.com/@LearnRetool-qn9dy which may help you get familiar with the most important components you'll be using.
In general the forum is a good place to ask your questions and struggles, I'm sure you will get the answers you need here.
Good luck!