Initialising a PS4 means resetting it to factory settings.
ie. you wipe the console clean of everything except the firmware.
Big call.
Running Safemode "Rebuild Database", or deleting GT Sport from the console, running Rebuild Database, and then re-installing (using a wired connection) would be a much better place to start.
*Edit*
Some official info. on how to do it and what each function does.
https://www.playstation.com/en-au/g...-system-stability/safe-mode-on-playstation-4/