I had the same problem as you for the first two weeks, but I started doing something different and after the last 6 I have gotten fantastic results. It’s an idea that bodybuilders used, my mate at the gym taught me it, and I applied it to PE with great results
If you want to get fantastic muscle gains, than what you do is add a little bit of weight every single set, every single day. For example, if you curl 30 lbs, you would curls 3 sets of 30, 31, and 32. Next day/week you would do 31,32,33, doing all of this with emphasis on form and short rest in between sets.
While the penis isn’t technically a muscle which you pointed out so matter of factly in a previous thread, any tissue/ligament/tendon will respond to stimulation, you just need to find the right kind.
Since you are still on the newbie routine, I would say make every 2 days 1 “set”. Now for every set you increase, go up with slightly more pressure, squeezing the penis harder and harder for each set. I have also been going up 5 jelqs per each set. Do you think the guy in the PE instructional videos started at the insanely high pressure he did? No, he worked his way up and once he got experience he got to the point where he could squeeze that hard without rupturing blood vessels. See if this helped you, I know it helped me.