Help please

Hello guys, I am new to Mac’s and any apple product.I recently bought(30th June) a macbook Air 2015. Well i noticed some problems, i want to confirm that if these are defects or not. The nearest apple service centre is a far away from my home, and going there and getting my laptop checked will take a whole day.

The first problem is that the screen is not uniformly lit.There is a dark shadow at the bottom of the screen. At the same time the lower part of the screen and the left side is less bright compared to the top and right side.

The second problem is that the left speaker is weaker than the right.Whenever I play any music the sound appears to come from the right hand side.

The third problem is that keyboard buttons of the left side are harder to press than the right side.

I did a bit of googling and found out that the screen problem was normal with previous version of macbook airs.

It would be very kind if anyone can tell me if these conditions are normal. Or should I take a day off and take my laptop to a apple repair shop.

The screen problem is normally not noticeable,its just that whenever i notice i go crazy over as considering the price I paid for the laptop.