Kindle is the nice device for books reader. You can download the number of books on your Kindle. But initially, you have to Activate that kindle by making  account on that after that you can enjoy the Kindle service. When I bought the Kindle I was also not aware of kindle but know after using it I have learnt a lot. One other thing I want to suggest that whenever you will face any technical issue than you can contact to kindle support they are very genuine I usually take service from them. 

You can download the number of books in your Kindle. When I bought the Kindle I also faced the same problem but then one of my friends suggest me about kindle support they are very genuine I usually take service from them. Even you can get the instant solution by dialling 1-800-807-8179.