A question: jelqing with 95-97 erect penis

Hi guys, for a reason I am not able to control my penis while jelqing.. It just stands 90 degrees and won’t go down. I was thinking maybe to masturbate before I do PE, since other wise I am doing jelqing with stiff penis. I have no problems with jelqing at full erection, my penis just gets harder and more veins are visible. Do you think I will injure my self if I keep going? I just feel its working for me like this with erection at max. Thank you for your time!

Injury potential increases sharply as erection levels pass 85%, and effectiveness decreases because the tissue is starting to ‘lock up’ and become rigid as it is designed to do at full erection, which means it doesn’t have the same capacity to expand elastically as it does at lower erection levels.

There is nothing wrong with masturbating first if you have to, but you will find that after a couple of weeks, your penis will learn that jelqing is not wanking - for now it doesn’t know the difference because every time in the past that you have started pulling on it, it has expected to get as hard as it can. That will pass.