Welcome to MR, garbanzo
. How exciting to be getting a new Reader. I don't have any experience with formatting, I just prefer to have it usable as soon as it is downloaded. Hopefully, a more experience member will be able to answer that for you. But, in the meantime...
I believe that you can go ahead and download the Sony Reader Library program to your computer to start setting up your ebooks. You can even explore using
Calibre and Kovid, the creator, frequents the forums here. We even have a dedicated
Calibre forum.
Did you know that MR has free ebooks? They have been beautifully handcrafted by some very dedicated MR members. (I believe that they are better formatted than Google books.)
BBeB (Sony lrf format) and
ePub format
Free ebook sites
feedbooks.com
manybooks.net
Free and for purchase ebooks
smashwords.com
baen.com
Plus Baen has a
great free library
Have fun exploring the forums and ask if you have any questions.