In order to make it look good you definitely want to stabilize your ollie first so that it feels like a late trick, of course you can just barely pop and turn your body early to facilitate it in principle but that's how you get weak ones. Timing is like one of those frontside 180 ollies over relatively tall stuff except you don't exactly wind up the same seeing as you're not trying to bring the board around with you, so there's less effort involved. You want to keep the ollie straight (you want to maximize that step, that is why delaying the rotation is important), but you do want the part where you drive the nose down like you would over an obstacle or on a nosebonk and that is during that weight shift that you turn. Turn mostly is a lower body shuffle and crossing of the legs, if familiar with fighting stance switch footwork in some martial arts (Vivien Feil compares it to taekwondo), that is the exact same thing. Upper body doesn't do much but already should be facing mostly forward anyway like one is tempted to do on big ollies and frontside 180 ollies and so only has to shift the opposite way just a little as the lower body from the hips down catches up.