Connecting to my home computer

Hi, I would like to connect to my home computer using WinSCP. I installed openSSH on it and activated it. When I tried to connect to it with my laptop when I am at home (on the same wifi connection) it works, but when I am at work (on a different network) it doesn't work. What should I do?

Thank you.

You will typically need to enable/forward incoming connections on your home router/modem.
This out of scope of this forum.
See https://superuser.com/q/794287/213663