I had that EXACT same problem when I was learining matrix. 2 things. #1 you are NOT a noob. If you can do some or all the intermediate tricks. #2 like fatstrings said “practice leads to smoothness, and smoothness leads to speed.” He is right. You will get it eventually. But, another thing you could try is as you are doing the first “roll” begin to wrap the string around that NT pointer, and when the first roll is finished, you can go right into the 2nd one and go right back into the double or nothing mount. Hope this helped. Good luck