Hi Z-man, welcome! Congratulations on ordering your Kindle.
1) How do I register it or will it already be registered?
It should already be registered. To check, go to Amazon, click on one of the Kindle departments and then you will see a bar across the top of the page, under the search box. Click on "Manage Your Kindle". There you can see any Kindle devices registered to your account.
2) How can I find out if I have Whispernet coverage where I live - short of waiting till I receive my Kindle.
Amazon has a map
available here.
3) What cover or sleeve do you recommend - looking for low cost - not the $75 type.
I use
M-Edge covers, love them! I have the Platform, Leisure and Latitude, I use the Leisure one the most.
4) Where do you go to find free or low-cost books - I'll be searching if here for more of those.
Keep an eye on the
Book Bazaar section of the forum. Public domain (free) books in Kindle format are available from
ManyBooks and
Project Gutenberg, among many others.
Inkmesh also keeps track of free Kindle books on Amazon and other places.
Enjoy your Kindle!