If you want a professional experience, you need software designed for karaoke hosts (KJs).
Connect your laptop to the PA speakers via a 3.5mm to RCA (red/white) cable or USB audio interface. Do not rely on Bluetooth for the music output. Connect your microphone to the audio interface or a dedicated mixer. Crucial: In your software settings, set the "Music Output" to the speakers and the "Microphone Monitor" to OFF to prevent feedback. computer karaoke
Play a song. You should hear the music through the speakers. Pick up the microphone. You should speak through the speakers. If you hear a howling screech, turn down the microphone volume or move the mic behind the speakers. If you want a professional experience, you need