The ignition circuit has nothing to do with your problem if the engine doesn't move when you turn the key. If the lights are bright and accessories work, the charging system is likely ok and the problem is in the starting circuit.

Begin with removing the battery cable connections, clean the battery and cable terminals. While the cables are disconnected, go under the truck and do the same with the cables to the starter/solenoid - should be 1 large cable and 1 small wire. Reinstall the wires at the starter/solenoid, then the battery connections.

If you have a meter, remove the small wire from the starter solenoid switch, have someone try to start the truck while you read voltage between the wire and chassis ground - you should see battery voltage - if not, there's a problem in the ignition switch or the wiring from the battery through the switch to the starter solenoid. If you have battery voltage at the wire when the ignition switch is turned to "START", but the solenoid doesn't click, the starter solenoid switch is bad and you should remove the starter and have it and the solenoid tested at an auto electric shop... if you're feeling lucky, you can replace the solenoid switch and see if that does it, but the starter motor should be checked. If you prefer, you can replace the starter motor and solenoid switch as a unit.

Be prepared to get a bit aggravated if you find it necessary to remove/replace the starter.

Good luck,
Frank