jelqing alone does not add length

[Jay1983]

Count the popcorn on the ceiling. Watch the news. Listen to music. Don't PE butt naked.

[Jaw Breaker]

How do you do it at a low erection?
I keep getting hard

Learning self control is part of the process. Like Jay said ... do things that can take your mind off of it a little. Breathing techniques can help as well. Sometimes it just helps to take a few deep breaths and let the erection subside a bit before continuing jelqing. That's what works for me.

[Big Al]

Be wary whenever the word "impossible" is thrown around.

The flaccid jelq with little to no lube can be an effective lengthening exercise.

[Straw Bat]

I gained .3 in ~2 months but was already long. I believe I gained it pulling too hard while jelqing, at too low an erection level; it is an unneeded and thoroughly unwanted gain.

[jockinthebox]

How do you do it at a low erection?
I keep getting hard

Jelqing should be done @ 40-70% erection max, as a beginner. Stretches should always be done flaccid. Keep practicing and think of PE as exercise that's good for you, just like lifting weights or running. Listen to some music while PEing to help control your erections. You have to train your brain a bit to acclimate to PE as exercise, instead of masturbation as a beginner, but, with practice you'll get the hang of it pretty quickly.