You can check whether it’s running by executing:
sudo systemctl status orac
sudo systemctl status mec
orac is the main thing producing audio, mec allows control via remote clients.
If they are running correctly, you must use either the same or another device in the same network to run one of the clients and connect to the server to control it. There’s a PD one but you may use other alternative ones like lemur or a web client: Web client for ORAC 2.0