When the key is turned on it just clicks, but after several attempts it starts

If it is just clicking, you must have a bad connection at some point limiting the power to the starter. It could be the solenoid on the starter itself, or a weak ground to the engine block. Make sure all battery terminals are clean and tight as well as the ground to the block. When it happens again, have a helper turn the key so it clicks while you check for power to the smaller wire on the starter. You should have 12+ volts there. If you do, the starter is the issue. If it isn't there, you need to back track and check the relay, ignition swtitch, wiring.