Hi , just started the tokyo one stroke course from essential nails after having a fairly long break from doing nails .. yep its pretty hard but i am on my second day now and just about ready to complete one of the designs for assessment. I find if i over think about the position of my hand then it starts to look rubbish ! I am finding the best way to hold brush is between thumb and middle finger with index finger raised and not touching the brush that way you can line and roll the brush using your thumb at the same time which is basically what you need to do to complete the shapes that make up the designs. I remember feeling this way when i started acrylics, that i would never get it but i am sure all of a sudden it will start to flow .. i hope !