Need some help with diagnosing my car. Young guy learning

Good factory prints are your best friend.
I've got 73 prints and extensive experience on that and a 74 car.
I can tell you there are some differences in the cars.
And not all the stuff matches the prints.
BUT those things can be "by passed" for a simple problem like yours.
People have made the best suggestions for the most likely candidates of your difficulties.
You can figure out why your engine won't turn over or crank without all that extra stuff.