Realistically, you can not get internet access from your room.
In theory, it is not impossible. If you have an Internet Service Provider with dial-up access and a laptop with a telephone line modem, you could use the phone line in your cabin and dial into your ISP. But the phone rates (ship-to-shore) are on the order of $5-6 per minute.
And of course, if you have a satellite phone (assuming those things are still oporational), you could connect to your ISP with that as well.
The only realistic way to get internet access from on-board is to go to the internet cafe where they have computers that you have to log into. BTW, the keyboard and mouse are effectively the only thing of these computers that you can touch. There isn't a CD or a USB cable that you can connect to for you to do things like download files and pictures from your digital camera or your laptop computer.