I know exactly how you feel, I spend more time reading about PE than actually doing it.
Regarding the not being able to stop the load from blowing whilst edging, I have found, that when at the point of 9 (10 being ejaculation point), grab some pubs from where your bikini line would be, and just pull and hold them. It’s a bitch, but the pain from that will take your mind off blowing QUICK-SMART.
I only started edging 3 days ago and I haven’t blown yet. Its had a 100% strike rate for me, and before that I had allot of trouble holding it in. Hopefully that is some help.