Try this: retract the foreskin, and hold it at the base of the penis, or underneath as you hold and pull the scrotum to keep it tight. Use some lube or olive oil. (Do not use Vaseline, as it is based on petroleum). With the other hand do the jelqs combined with kegels, just as one do with two hands.
Ok, using only one hand is not as effective, or so they say, but yesterday I had a fantastic session of one hand jelqing and kegels. It felt like my glans were about to burst. I am circumcised, but it was done when I was grown up, and the skin is still loose, so I hold it down with the scrotum. ( probably to much masturbation, lol)