./Nethermind.Launcher you have two options -
Ethereum Node and
If you launch the Node in one process and then launch the CLI in another process you will see available commands inside the CLI.
CLI will display available options (functions and properties) when started.
CLI will allow you to query the most basic info about the node quickly.
You can issue JSON RPC requests to the node
You can combine the former two
You can create and call functions
You can retrieve node objects
And work with node object properties
You can navigate to previous commands by using arrow keys
You can auto-complete basic command with tab
For more advanced operations with the node use Web3 or ether.js libs or Truffle, Metamask, etc.
Below you will find the available list of CLI operations and you can find more information about each call in JSON RPC section.