The good news is that it should be an easy transition since most of what you do know should work. You will gain a few extra features, but you'll probably find a few are missing too.

If you are looking for hassle free, update the firmware when you get it and then disable the Wi-Fi. Don't load the Kobo desktop software. Load books onto your Kobo with Calibre (or ADE or via the filesystem) instead. This will circumvent automatic updates, which Kobo sometimes botches.