I am a creative cloud user with lightroom and photoshop. Now I was thinking of premiere pro. What would that cost me ?
I see you have an active Creative Cloud photographer's subscription under the same Adobe ID as with forums. If you wish to add Premiere Pro, the price would be $19.99/ month.
For more details, please refer:Creative Cloud pricing and membership plans | Adobe Creative Cloud
You may also Contact Customer Care for help and information.
In addition to the options Kanika suggested, this article may be helpful too. It shows how you could get pricing and info on how to upgrade your existing plan: