As the boys said, their are a few ‘interlocks’ in the starter circuit between pushing the starter button and the power wire at the connector that goes on the relay itself.
They are the first things to check, clutch lever switch, red kill switch, side stand switch.
I would check each switch has continuity individually, tracing the circuit from start to finish with a test light.
Then test the relay is good and is switching power across the terminals when applying power to the relay.