I've just started stretching and I have a question. I pull back the foreskin so it's like stretching around the head but should I just like hold it in place around the head or should I use motion like pull it back over the head and push it back into place and repeat that?
Hold it to where it is maximally stretched. In addition, you can pump your penis by squeezing/tensing your groin area to give the penis maximum thickness. You can also pinch off the base of the shaft to trap the blood there. Experiment, you'll see what I mean.