It seems that I'm not connected to localhost:2333, how can I verify or just know what is my RPC?
Is your node running?
If no, you need to run it together with the mining software.
What are you using, the GUI or CLI?
If it's the GUI, you might be needing to add
server=1 to your config file to enable RPC outside of the GUI's console.
(
that's based from Bitcoin Core's behavior)