Help - New Android user struggling

I am new to android and really struggling to get to grips with it on my new tablet. It lloks great and tft screen works well as well as processor but...

1. Copied music files across from my windows laptop via usb stick but they sound really tinny and vocals sound as if they are coming down a tunnel?
2. Tried to connect direct to Laptop with windows 7 and days device not recognised?
3. Downlaoded Kindle for android onto tablet and bought a book but did not download, even though in the purchase it said download to rogers android....
4. Bought a book through google play app expecting to be able to read that but apparently not unless I am connected to wifi

Not having a good expereicne, anyone help