Jumprope 500 times

I’ve made some progress here: Bought a jumprope. It kind of sucked. I thought it was me, but the rope was terrible. Got a replacement and it works great. But now it’s clearly me. I need to practice more. The problem is that I need to count, but counting means focusing, and focusing screws things up. At this point I can do somewhere between 50-150 before failing. It’s not the endurance, it’s the coordination I’m having issues with. Need more practice…