Hi, for the moment I don’t have any idea but from your post may be there are some steps you want to try again.
For above step, may be you need to disable “Secure Boot” from your BIOS setting. Usually with dkms it will generate new module during the booting. You may also need kernel-devel and kernel-header to install.
For boot config that needed to create initial .config, I believe in Fedora Linux it available in /boot/ directory with name start with config-* followed by kernel version. Usually we want to use the latest kernel version config-LATEST-KERNEL-VERSION-INSTALLED. You could check your current kernel version with uname -r.
For this step, you also need to disable secure boot in BIOS setting since look like you want to install custom kernel build.