Help with crackle paint!?

I followed the directions and I am having major problems with this technique. I am painting one wall in our bedroom. I am having problems with blending the top coat evenly. I have tried doing long brushstrokes, but you can see each section where I have stopped and started again. It is impossible to do one long paint stroke from top to bottom of my wall. I also miss tiny sections of the wall and then cannot go back to put paint on them because it takes off the crackling paint on sections I have already painted. This is a mess and very difficult. I love the look though (when it’s done right). Any tips would be so helpful!!!