Kindle application operation

Hi all. I am a first-time Kindle app user. I have a couple of questions or problems with it. I downloaded the NIV Zondervan study Bible. I was wondering if anyone knew how to access the chapters? I can access the books of the Bible through the table of contents, but cannot figure out a way to easily access the list of chapters for each book. Also, I understand the concept of selecting text via the left and right boundaries. But I am not able to really understand how to expand the boundaries beyond the text that is shown. One more concern. Does anyone have problems with downloading samples of books in the Kindle application? I was told that you can't download books on the iOS platform. But you can download the samples. I'm not even able to add items to my wish list. When I double tap on add to wish list or download sample nothing happens. However an amazonrepresentative was able to turn on voice over and download a sample of the book without any problem. I've tried uninstalling and reinstalling the app. Any suggestions, ideas or feedback would be great. I really enjoy the app though. It seems like it can open up a whole new world of possibilities. For books that aren't available on bardor other specialty places. Thank you.