Miami is a good first step. If I recall, you've got a nicely upgraded A600, so MiamiDX would be better - I think it's more suited for ethernet operations.
As far as actual configuration goes, however, I'm not sure if I can help you. It's been many years since I connected to the internet that way, but I suspect there are a few settings you'll need to adjust in Windows' network Prefs. And I'm relatively certain Miami should be configured for a static IP address.
I would strongly suggest getting a router. If you've got any other computers you want to get online, it will make your life so much easier.
