After canceling your subscription, you may wish to reactivate it/resubscribe and resume your learning (rest assured - all your course progress has been saved).
1) Navigate to your My Account page
2) Select Subscriptions/My Subscription from the left-hand side menu.
3) If necessary, select your most recently canceled subscription. Then, in the top table, select the Reactivate/Resubscribe button (the button text will depend on whether your current billing period has ended or not).
Once selected, billing for your account will resume with the same frequency as your previous plan.
If you reactivate before the end of your last billing period, you will not be charged until your next scheduled billing date.

If you resubscribe after your last billing date, however, you will be charged immediately. Further, your billing period will move to reflect your reactivation date.

Please note, however, that if prices have increased since your subscription was active, you will no longer be eligible for the old price you were paying. Instead, you will need to pay the retail price.
After reactivating your subscription, you are free to change your plan as needed. For more information, please visit the following article: How do I change my subscription plan?