For me, I noticed enlargement over night. It was that fast. It's still grown a bit more but I don't get random erections, they're all from myself. I think it might be because of stress, I don't know. The changes you get depend on your genetics.
You can make a penis pump by cutting off the top of a syringe. Doesn't work too well in my experience, but it's how I've been told to make them.