I honestly would go for the solidly trusted "just rent some hosting and use Comic Press for it". Most comic hosting services like Comic Genesis (formerly known as Keenspace) and Drunk Duck have terrible reputations and often require people to give up things like publishing rights for their own work (in other words, if you do use these, actually carefully read the terms of service).
But don't take my word for it, I'm honestly not knowledgeable enough about hosting to really give an informed opinion. I suggest you ask around at Webcomics Community forums, which I believe is the leading source of free advice on webcomics since Webcomics Dot Com went behind a pay wall.
As for transferring from paper, I'm a big fan of Tablets, even the cheap ones work great after a short learning curve (though I'd recommend Wacom because they're simply put better quality). I'm not a huge fan of scanning because most regular household scanners don't give enough quality for something like this, but you could always clean it up in photoshop (or digitally ink it).