Hi, if you need help installing NoMachine for Linux, we can of course help. If you’ve not already taken a look at the Installation and Configuration Guide for NoMachine, here is the link: https://kb.nomachine.com/DT04U00269.
You should install NoMachine (free version) on both machines. That way you can connect from one to the other, in either direction, i.e each of them is a server and a client. Also take a look at the following getting started guides:
https://www.nomachine.com/support/documents/getting-started-with-nomachine
https://www.nomachine.com/support/documents/getting-started-with-nomachine-network
If you have any other questions, let us know 🙂