Quick Extender Pro Question

Ok so I’m new new just got my Quick extender pro yesterday. I’m having issues. I don’t have a computer so can’t watch the provided DVD for instructions. Been combing the internet and can’t find it in a hard copy. So listed below are my concerns and questions.

The straps should go behind the head gland correct?

I feel like I’m not getting enough pull if I add bars I’m unable to strap my penis behind the gland. I am seeing it stretched but don’t feel anything. Is this normal or should I add more bars and pull my penis to fit?

Is there a way to prevent pinching when strapping in? I have sores from the pinch. Also probably just a beginner issue.

For now I’m only using one strap due to if I use two my gland is right under the strap.

Also the tip of my penis goes numb and cold. Is this normal?

Any help or information is greatly appreciated.