That is the standard message shown for this trials. I know it can sound confusing but when the game launches on the 9th for you then you will be able to continue playing without limits. If you have the game icon in your library right now like in your picture, then you are already all set to go. The trial is also the full game download so you dont need to download anything extra atm other then the day 1 patch which is around 1 GB.
In the meantime, you can still play some side stuff if you what since you still have some time left on your trial until the game launches. Enjoy!
