Camera Focus ISSUES

I’m trying to get an effect with the camera where a close object gets blurry and the rest is in focus. I’ve tried creating a post-process volume and fiddled with the DOF controls, but no luck… The effect I’m looking for is when aiming, the camera gets closer to the character (I have that sorted out) and said character gets blurry, like in TLOU2 or RDR2 when aiming.