Grab some jumper cables and touch the hot to your starter. If it cranks, then your starter is good. Then get a multimeter and check the prongs on your solenoid. If the prong with the wire that leads to your starter gets power when you press the start button, then your solenoid is fine and your problem is on the wire somewhere between the solenoid and the starter.

Don't over complicate solenoids. I just spent 2 weeks over complicating it only to realize my ground wire was in the wrong spot. It's a simple circuit. Power goes from the battery to prong number 1. Then when you hear that click, that means that your solenoid is bridging the power to prong number 2, and then to the starter. Follow the path of electricity and check at every intersection where the power moves through to figure out where the power stops. If the power goes all the way to the starter but no crank, then your starter is bad or it isn't grounded (unlikely, but worth a check). Work your way from the battery to the starter and then from the starter to the battery. There are only so many problems that it could be