Novices and newbies discussion

Hello everyone. Background story: Spoiler At first, I wasn’t into BDSM; she probably wasn’t either (I guess). The start of next month brings a “make or break” conversation about our future. I decided to show that I’m totally serious with my devotion to Her, so here comes the chastity device idea. I want to give her the keys and hope she doesn’t take them, because it’s not really about chastity; it’s about proving how important She is to me. But this bluff… might have failed, so I have to be prepared to stay caged, potentially forever. I can’t predict with certainty how she will react. It would truly not be a problem if She wished for it, but I don’t think that’s what we need. So, since more than a year ago, I’ve been preparing for this. Did some research and bought several devices in different shapes and sizes. Tried them out and found the only one that fits well (N21). Recently, I tried wearing it for an extended period. After the first day, I noticed slight pain on my skin around the ring. Once I started using a skincare cream, the problem was solved. As more time passed, I became incredibly aroused. With no way to release, my penis filled the cage almost all the time. Then, after three days, my scrotum swelled and shifted colors between red and blue. It became more than twice as big as usual. I felt a little pain, nothing special, but I was worried about it, so I removed the device (and it wasn’t that easy to remove by the way; at some point, it made me scared…). Twelve hours after release, my sack is still bigger and a bit hot. Putting ice on it helps a lot. I don’t know what may be wrong. I have two ideas, but I’d like to hear opinions from someone more experienced.

1. As my penis grew in the cage and stayed “harder,” there was less space between the cage and ring for my scrotum, so blood flow couldn’t work properly. It swelled, creating even less space, making it bigger… you know, an endless circle.
2. Since the device forced my sack closer to the rest of my body, it became hot. Then it swelled to release temperature so the cycle from point one could begin. What should I do now? I really appreciate every kind of advice. Will my body get used to the device if I try staying caged a little longer? If possible, Do You have any tips and tricks to make it easier (regular cooling with ice for example?). Thank You in advance!