You can easily review the course you have completed via the 'My account' dashboard for 12 months after you enrol.
Simply login and click on the 'Do Course' text link in the course progression menu. You can see this menu item above the certificate download button.
Next click the green 'go to eLearning course' button to proceed to Moodle.
Once you are on the eLearning platform, you can select the module you want to review. You can either step through the course using the slide numbering on the bottom right, or use the top right menu icon to show the chapters. This way, you can jump backward or forward through the course without having to step through the entire course.