Think about what you are doing. Do not try to memorize. Be sure you know each concept before you go on to the next. This course is cumulative, each new concept is built on the last one. If you do not understand a section, stop and reread it.
Most students reread each chapter several times.
Study especially intensely in the first half of the course. It is especially important to master the material thoroughly at the start of the course. If you have mastered the first half of the course, not just learned the general idea, the second half will be easier. Help each other. Students approach statistics with apprehension and in actuallity you could go through life without ever learning statistics.