How to use Helix Syn/Aneros properly?

I just got my Helix Syn and I’ve had 2 sessions so far. I’m confused on what I should be doing to get pleasurable sensations and orgasms. I haven’t really felt any pleasure from either session. I did precum quite a bit throughout both sessions but I didn’t really get any pleasurable feelings. And toward the end of my first session I thought I might have felt a few gentle muscle twitches.

Typically I start on my back with my knees bent since this position is comfortable. Then I spend the first 10 minutes trying to relax, not doing any contractions. Then after 10 minutes I start contracting then relaxing the contraction and then repeating the contraction process. I would also masturbate occasionally throughout both sessions but stop before I cum. Both of my session were a little over an hour long.

I guess I have a few questions. Should I be contracting or should I just do nothing (do nothing approach)? And if I should be contracting, with what intensity should I do it with? Do I need to focus on breathing at all? Should I refrain from touching me penis or masturbating during a session or does it matter? Are there any specific things/actions that I need to be doing in order for the Syn to work?

From the Aneros website forums, it does seem like it takes a while to master using this toy, but I want to make sure I’m doing everything right.