How do I integrate the Ruuvi Gateway and Ruuvitag Pro into Home Assistant?

Hi, I’m totally a newbie to Home Assistant. I recently purchased the Ruuvi Gateway and a Ruuvitag Pro sensor.

Can someone please help me to integrate the Ruuvi Gateway and the Ruuvitag Pro into Home Assistant? So far, I have followed the instructions on this website up to step 2.

I’m stuck at steps 3 & 4. As I don’t know much about python, I don’t know how to proceed with steps 3 and 4. Detailed instructions would be much appreciated.

I’m running a vm version of Home Assistant under Windows 10 host.

Please help.
Many thanks!