Am I doing something wrong?

Hi, so I made some real progress for the first time last night. I managed to get the involuntary spasms going, although that’s all that it was. My entire body was shaking but there was no real pleasure. This shaking went on for 20-30 minutes before I called it quits as nothing else was happening. Don’t get me wrong the spasms felt alright but nothing life changing like so many other people write about. There was also no ejaculation or erection, though I know a lot of people don’t get those. Did I do something wrong or do I just need to progress further than where I was and stick it out longer. Or did I actually have a Super-O and it just isn’t as good as other people claim?