A small network for the home

Hi,
I have a dell latitude laptop. With a network adapter card. When I’m at work I plug in my rj45 cable to get on the network. What I would like to do for my home and currently have at my home is the following: I have cable modem going to a desktop computer. I would like to make a small wireless network for my home. I’m not sure how to go about this. I would like to add a wireless network card to my latitiude keeping the other network card in there for work. And I know I would have to change my desktop to a wireless card and I would have to also buy a access point.
In theory I think I’ve thought some of this out but I know I’m missing some things. Any help would be appreciated.