home to office connection

Hi,
I’d like to connect my home computer to my office computer, both computers using wifi connections.
could you tell me how to let those computers talk ?, currently I use windows avast vpn, my office computer runs ubuntu 8 with web based appilcation.
Thank you for your helps.

Regards
fatahuddin djauzak

Does this help?
https://www.howtogeek.com/176471/how-to-share-files-between-windows-and-linux/