Can you tell us what version of NoMachine you are connecting to and what language and model you want to use fo the keyboard? As far as we are aware there are no keyboard issues on the latest version.
NoMachine client doesn’t emulate the right mouse button using the ctrl key, because this would affect the remote applications that actually interpret ctrl+click as a command. I suggest changing the trackpad settings to emulate the right click in a different way (for example using two fingers).