Hi Klciuum,
Most of us write English here, I don't really understand French, sorry about that. Looks like you might not had this wanted to post it here? ;-) The section here (Forum --> Racks) is visible for everyone :-)
Little remark on your rack here, looks nice but please look into more classic/simple modules as well. Sinfonion is definitely a nice module, I got one and love to use it but keep in mind that's meant for large environments, meaning you need to provide it with lots of input (for this beast you just can't have enough VCOs, filters, LFOs, EGs and VCAs), so it can produce even more output. But... it's a fantastic module!
Similar comment for the Rainmaker, I don't have it but I am quite sure it's lovely to use it, but for starters I do think it's A) too large --> sucks up a lot of your available HP-space and B) it might be a bit too complex (like the Sinfonion) to start with.
Good luck with your modular planning and kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads