Look, LZ is learning the two-step flow, right?
At first you can shrug your shoulders when jumping to coordinate, I was initially stiff and uncoordinated like you, but shrugging your shoulders while practicing is not the same, at first a little uncomfortable may be uncoordinated, and slowly you will find yourself in the mirror feeling like walking in place. I don't even shrug my shoulders anymore, I just jump in the same position as when I walk and shake my hands. I also do two-steps. Also, when you shrug your shoulders, jump and shrug a little bit, and remember not to shrug too high. First slow and then fast, you know!