Am I able to save my work & come back to it later?

Yes, you are able to save your work to come back to it later. Make sure that every time you complete a session, click the menu icon in the top right corner, then 'Exit Module', and then '>> Click to Exit Module'. Don’t leave the course open and idle for long periods of time or your progress may not be saved. When you successfully pass the assessment make sure to click 'Assessment Results' which will return you to the top of the page. From the 'Assessment Results At the top of the page, click 'Go to module 2/3/4 '. This will save your assessment result and exit the module.