One week prior to your course start date you will receive Account Activation Instructions. You can see an example here
Please ensure you read this carefully.
Once you are registered you should be able to access your University email.
If you are not clear on anything about your Account Activation Instructions please refer to the support emails included at the end of the document.
Take the time you are waiting arrive on your course to look at Section 3 – Pre-arrival course materials, starting with 3.1 Reading and understanding feedback.