How long you have to access the course depends on the course you've chosen.
You can find more details about how long you have access to each training program on their specific course information page.
Bear in mind:
You can find your course expiry date in the portal when you log into your course.
Once a course has been started it must be completed within the course validity period.
After a course has expired, you will not be able to access that course and a new course will need to be purchased.
The expiration date on a course cannot be extended.