Hi, I want to share desktop computer's internet which is connected through ethernet cable (I don't use a modem or a router) but doesn't have wi-fi built in, so I can have wi-fi internet on my android phone. So can I just buy a usb wi-fi adapter, bridge its connection with my ethernet connection and create a wireless hotspot? Or do I have to also buy a wireless router, setup a wireless connection and connect both the PC and phone to it? I'm new to this so sorry it's difficult to understand me.