Introductions discussion

Hi all, I’ve always found the concept of chastity exciting, and I finally decided to commit by purchasing a CB6000S for myself. Since I usually masturbate daily, I realized this would be quite an ordeal. My initial approach was to test it solo before handing over the key. The plan involved keeping the key at work—starting with just one night, then a full weekend, and eventually aiming for a week or more. Overall things are going well until bedtime: the ring tends to push my scrotum forward, making it hard to sleep without feeling them pressing against something or getting in the way. Additionally, on that first night I wore it, I had an erection that refused to subside, so I ended up unlocking myself and masturbating just to get some rest. I’m also noticing that the plastic ring starts chafing the underside of my balls after a while. Perhaps switching to one with a metal ring would reduce irritation? I’d really like to try those smaller metal cages that prevent any erection whatsoever, though I wonder if they’re suitable for beginners? Also worth noting: I am circumcised, in case that makes a difference. Any advice is welcome!