Installation problem

Hi there, new at this forum aswell on the program. Im having problems connecting to the hassio. Im doing as the guide https://home-assistant.io/hassio/installation/ says but i cant do the “reach your installation at http://hassio.local:8123.” Ive also tried accessing it from the ip adress but not even that i can do. Im lost and i dont know where to start.

Ive etched the file into an SD card and then put it into my PI3, and thats as far as i think ive done it right.

Are you connected with an UTP cable or wireless?
Check on your router that you see the Hass.io in the dhcp leases.

If it is not there, then there is a problem with the connection to your network.
But if you can find the IP address try to access it at http://[IP-ADDRESS]:8123