Re: I want to restart BF5 game progress

If I'm remembering correctly, resetting online stats hasn't been a feature since BF3/4 Premium (and it wasn't a normal, full reset either). I'm afraid you'll need a different profile if you want to start at 0. Honestly, I wouldn't worry about it too much - Soldiers can only level up to 50 and most weapons won't unlock without some playtime anyway (plus Battlefield is always about PTFO, not KD). 

Your single player progress can always be reset though; there should be a button prompt somewhere in the story menu (sorry, I'm currently away from my console so I can't check)