1. On the dashboard page, you will find the "upgrade" button located next to your profile photo. The button will be signed with a crown sign, indicating the premium upgrade option.

2. Clicking on the "upgrade" button will redirect you to the next page, where you can explore the available plans. This page will provide you with information about the features and benefits included in each plan.

3. There are two types of plans to choose from: monthly and annual. It's important to note that selecting the annual plan comes with a special offer. By opting for the annual plan, you will receive a two-month credit, meaning you will only be charged for ten months instead of the full twelve.

4. Once you have decided on your preferred plan, click on the "Get Started" button to proceed.

5. On the subsequent page, you may have the option to enter a promo code if you have one. Look for the designated spot where you can insert the code to avail any applicable discounts or special offers.

6. After entering the promo code (if applicable), you will need to provide your payment information. This typically includes details such as your credit card number, expiration date, and security code.

7. Once you have entered your payment information, you can click on the "Start Trial" button to initiate your premium subscription. This will begin your trial period, during which you can explore the additional features and benefits available to premium users.

8. If you need to update or change your credit card information at any point, you can do so by clicking on the "payment methods" option located on the left-hand side of the page. From there, you can add a new card and remove or edit existing payment methods.

9. To access information about your current plan, including its features and expiration date, you can navigate to the "my subscription" section. This section will provide you with a comprehensive overview of your subscription details.

10. Finally, if you decide to cancel your subscription, you can do so by clicking on your profile photo. Scroll down until you find the "current plan" section, and at the bottom of the page, you may see the option to "Cancel subscription." Keep in mind that even if you choose to cancel, your subscription will remain active until the end of the current billing cycle, allowing you to continue enjoying the premium benefits until that time.

By following these elaborated steps, you should be able to successfully upgrade your account to premium, manage your payment information, and access information about your subscription.