Thanks to the help of the good TLE, I was finally able to compile and install a custom Kernel on Fedora. I had to install several new libraries and files to make this Kernel work, but at the end it seems that I succeeded. I used the wiki procedure since the universal one I could not make it work at the moment, the Kernel is still new and unripe, for sure it needs some testing but in any case, apart from a few interruptions of some processes, it seems to work pretty well. At this point I'd like to understand if it's possible to compile and install a stable version and not necessarily a new last version still under test. Downloading the sources according to the official procedure in fact, always tends to take the latest version...