Which program should I start with?

Hi Dom, Welcome to the site. I don't think you can go wrong either way. But I would probably start with the Build My Stock Swing Program. It's usually the first program I recommend and provides the hierarchy of where all the concepts and drills fit. That said, if you're too excited to work with your new Hackmotion, then I don't think it would hurt you to start there. I think at the very least if you go through the first couple of overview videos in the Build My Stock Swing Program, you'll have a better context of how the wrists work in the swing. I don't think you have to try every drill, but at least watch the section overview videos at the start of each section. Happy Golfing, Tyler