which operating system are you using?
When using WiFi you have to connect the EV3 to your router. Did that work? In this case you should have access via the shown WiFi IP address. That one is the one in the second line on the display.
When using USB or BT the EV3 is your access point. So you have to connect your computer to that access point. I do only have Linux where you have to connect via the network tools to your EV3.
Hope this helps a little.
I am feeling very depressed...