Hello. I am brand New åt this app and wondering if someone could be

Hello. I am brand New åt this app and wondering if someone could be willing to help. I want to print When I am away e.g. at my job and so on and Control the machine through my phone.

But what do i need to make it work?

Is it for example possible to Control the machine from Another city far away?

Appreciate all help anyone can give. Thanks in advance☺