Fitting the Base Ring

Greetings everyone. I’m new here. You can check my introduction post for more details. I’ve just received my sizing rings from mature metal. I don’t want to waste time or cash on plastic or inexpensive Chinese options. Two budget cages are heading my way, but I’d prefer to skip the hassle entirely. I am certain about being in chastity, so I plan to start with a jailbird cage and tweak it later if needed. I trust all my measurements except for the base ring size. Unfortunately, I’m quite small. A cock of my dimensions is suitable for locking. I’ve chosen the smallest diameter paired with a 1.25-inch length. I’m slightly uncertain whether going with just an inch would have been better, but I’ll start with 1.25. To be honest, I can’t even manage to put on the largest sizing ring. It’s not because I’m large; I’m actually quite petite. My testicles are likely average or small-sized, and my penis measures about 1.5 inches when flaccid. The issue is that my balls often sit high and tight against me. They don’t always do this—they hang low occasionally—but right now they’re too high for any ring to slide over easily. I can get one ball through the opening, but as I pull more skin in, my left testicle seems to retract upward and becomes difficult to locate. It’s hard to push it fully through because I can’t quite get behind it. If I struggle with a 2-inch ring—which I know is way too large—how will I ever manage the correct size…whatever that turns out to be? Would taking a hot shower help lower my balls so they fit into the base rings? Or is that not recommended?