The curve is very subtle, so it would not distort a football field or basketball court with any significance. Rather, you'd be more immersed in the picture.
As for glare from lights or lamps, there will be some reflection. No television yet has 100% non-reflective properties, and everyone has experienced this - even in the days of tube TVs. However, Samsung's panel technology dampens a significant portion of the room's light from reflecting back at you. So while there is some reflections caused by bright lights, it's greatly dampened.
Thanks for your interest in Samsung televisions.
The apps often need to be downloaded. Try launching the Smart TV platform, and going to the Apps page (with the three green boxes at the top of the screen).
From there, on the bottom of the page, you can see "Most Popular" and "What's New" and "Categories" as options. Choose "Categories" , and you should be able to navigate to the available Apps, with Amazon Prime being listed in the "Videos" option.
Does that help?