Let's start with the basics.
I have a Kindlewith the keyboard below the screen. The closest to this now is the Kindle Touch, which comes with the Wi-Fi instead of having to use home internet.
When the Kindle arrives it's empty. Plug it in to charge, and while it's charging go to the Amazon website and register your reader. You'll receive an email that is for use with your reader which is useful if you shop at other websites and need to "send" it to Amazon who forwards it to your reader. We'll get into that later. As you create your account for the Kindle you'll need to set up a payment choice. This is sort of like their "1-click ordering", but everything involving your Kindle is in "Manage Your Kindle". It's separate from ALL other ordering on Amazon. This was rather confusing to me at first. Since you're dealing with digital material that is instantly delivered it's set up on it's own account. You can still order physical items like you did before but you go through the shopping cart where you enter payment etc. just like before.
How Do You Load Books on to the Kindle?
Once your account is set up, click on "Kindle Store", then "Kindle eBooks". This is the main page for the digital e-Books. To the far right you'll see a Bestseller list divided into two parts: Top 100 Paid, and Top 100 Free. Go down to the bottom of the list and click "See all Best Sellers in Kindle Books". Now you'll see a page with both list on the same page. The one to the right is the list of FREE digital books that are the most popular. Far to the left of the page are the categories. If you click one of those it will give you the top 100 in that genre.
When you want a free book, you click on the title, decide if you want the book, then click the "Buy now with 1-click". You WILL NOT be charged as long as the Kindle Price under the book title is $0.00. It does generate a "thank you" and an email just as if you purchased it, but no money is taken out of your account.
Repeat until your fingers are tired, or you have all the books you need for your first day or week of owning a Kindle:)
Why are Books Free?
Sometimes book stay free for all time. They may be classics that are past copyright and have been made into digital volumes. Other times publishers are giving you a "taste" of an author by offering one of their books for free. Sometimes they are free for a few days, a week, a month or some unknown amount of time. Once they go back to a paid version, you still have the free one on your Kindle and in your archive for all time, as long as you "bought" it while it was free.
I LOVE reading, and I'm a fast reader. I'm also very eclectic. I'll read an Amish romance one day and the next day read a paranormal romance with werewolves. I also download free cookbooks, reference guides and nonfiction for research.
If you have any questions ask in the comments. Even if this is an old post I'll answer questions.