I had 10-15% success with late summer cuttings a few years ago. I was hacking off a lot of the low-hanging branches anyhow so I trimmed them, dipped in hormone, and stuck them in a mix that was mostly perlite with a bit of sandy topsoil. The few that survived didn’t start growing until the next spring, but those all grew pretty well the next year. I posted a photo here when I first potted them up the next spring:
Since you have access to plenty of seeds from your already-fruiting bushes, I think it may work better to just plant seeds and graft them later. But if someone has a technique with better success rate or faster initial growth, rooting may make sense.