Novices and newbies discussion

Hi there. Because of a sex addiction issue, some women suggested I give the chastity cage a shot. I looked into it online since this whole area was new to me, and now I’ve got my plastic sizing ring from Mature Metal delivered. I’ve been testing different ones to find the right fit—the one where only a single finger can slip under—but at the moment, I feel somewhat restricted and unsure. The problem is that with a smaller erection using this ring, there’s significant pressure on the skin near the top of my penis (pain level 7 out of 10), yet it doesn’t sit close to my testicles. With larger erections, my balls start feeling chilly and my penis turns slightly blue (dabadi dabada ♪♫♫♪♫ sorry about that). Before I spend a fortune on ‘queen’s keep,’ is this normal? I’m asking because I’ve read comments suggesting it might be risky for the nerves or, with the cage, completely stop erections so I no longer feel pain like this. That’s why I’d appreciate your advice.. Thanks ahead of time.