Take a piece of paper and draw a curving line. From the bottom of the line start making your feathers on one side. (practice and see if you draw a better feather starting at the bottom of the feather and finishing with the top. Then try the other direction. What do you think? Does one look better for you than the other?) Once you have finished the one side, give it a flourish at the top. Now follow your curving line, maybe a quarter of an inch or less down to the begining again. Now start going up on the other side. Usually we only make the feather well in one direction--go figure! For me it is going up. The book Hooked on Feathers is helpful, and will surely make you loosen up. It also gives you great ideas for embellishing the hook. Work on a practice piece once you think you have your feather right. Then go to your project. You may want to put a gentle curved line in chalk before you do it with your machine. Once again, your choice. Keep your sample to look back on. You can go back and run your finger over the feathers. This too is causing your head and muscle to remember how to make a feather.
It doesn't hurt a bit to make a sample quilt with lots of motifs, feathers grids and meanders. You can take out your sample and have ideas come to you on a block from basic stitches.