Doubts of a beginner

Forgive me in advance for my English, it's not my native language. I'm in my early 20s, I've tried methods like traction extenders and jelqing before. The extenders give me a lot of discomfort and pain. For this reason, penile pumps seem to me a more viable alternative.

1. Just using the pump brings permanent results??

2. Or should I combine it with some other method?

3. How much pressure should I use and the period of time??

4. Which one is better?? A manual or electric pump??

5. Should I do clamoing next to the pump??