Decide how large it needs to be. decide if it needs to be 120 volts or 240 volts.
Size will determine how large a circuit your need and if it needs to be single or double pole breaker.
Run the cable needed from the panel to the thermostat location and from the thermostat to the heater location.
hook up the cable and breakers.
Do not PM with questions that can be asked in a forum. I will not respond.