The story of the Dance is complete, so the ending is known unless the show changes it. Some changes are already there, especially the age difference between Rhaenerya and Alicent (book Alicent is 11 years older) and time compression in general.
The time jumps coming up will be jarring and there will be new actresses for Rhaenerya and Alicent. Some important male characters haven't been born as of the first episode.
I binge watched Game of Thrones over two months. For me, the show ends after season 6.
Is this going to be just one season?