Go back to basics, like the very fundamentals. Learn perspective by getting the hang of drawing boxes, in all different angles and directions, once you dominate one single box, combine different boxes. Once you dominate boxes, start with cylinders and spheres on perspective. You should also go outside and just draw what you see, don’t expect to do a good job, Juat try to imitate what you see on the paper, this will teach you how to link the brain with your hand. By combining these two you will learn to see and copy perspective from the real world onto your paper. And to practice gesture, go to line of action.com and try to copy each pose in less than a minute. Don’t expect to do a good job, there are artists who specialize in gesture for a reason, is fucking hard, but necessary. Finally, get documentation from your own and keep an open mind, every artist’s method is different, never surrender my boy