Definitive Pumping Routine

I’m new to pumping and I’ve recently purchased a LeLuv vacuum gauge pump. I’ve gone for the 1.75in cylinder for my 4.8in girth (6.8in bp length for informations sake) from the cylinder size guide by I believe hink.

I’m aware there’s already a lot of information in here for pumping, but there seems to be a lot of contradicting advice. So I’m trying to cut through the fat and get a relatively definitive pumping routine. I’ve some posts/commentors advising 5-8hg+ for 20 minutes and some saying 5-10hg for 5 minute intervals.

What I have tried so far is around 5-7hg for 4-5 minute intervals (after some quick stretching exercises) but I’m not really seeing a pump at all once I’ve exited the cylinder, only discolouration and red blood spots which stay for a couple days. I also try and stay hard for the entirety of my 4-5min intervals in the cylinder but this can be hard and I will sometimes jerk off to porn inbetween sets to regain or maintain an erection. I’m pretty much packing the cylinder at the base but not for the entirety of my length and my length is stretching to 7in in the cylinder. How can I avoid these blood spots? Am I actually supposed to be exiting the cylinder with a significant size pump?

Any help appreciated Thank you :)