Open in Google Chrome: https://www.amazon.com
and click on Sign In at the top

Now there are:

And now we register:
1) Write your first and last name
2) Let's write our own email
3) We will come up with a password and write it down
3) Let's write the same password again

Open the mail and read the new email (this is how the code will be):

Let's enter this code in Amazon:

Registered
We'll see that the main page has opened Amazon.com
I'm logged in (displayed at the top right of my name Evgen)