Connect Robot to Orchestrator and Deploy Process

I am using community UipathStudio but Uipath robot is not install in my system .how can I deploy my workflow or process in Orchestrator ?

How to sove this problem

In user domain/username what shouled we give ?

The username and password you use to connect to the machine where Robot is installed. The Windows credentials.
To see what your username is open a command prompt and type whoami.