Don't concern yourself with wormholes or black holes. They only exist on paper. Of course they are called theories. But theory is just another name for FICTION.
Tesla appeared to use FACTS gained by trial and error. Lots of experimentation.
It is my firm belief that anything you want to know is right in front of your nose. Learn to find the answers through trial and error. It's a time honored system that does work.
Tesla turned me on to resonance. I built several Tesla coils of my own. There are facts to be learned from first hand experience with them. Here are a couple of videos I made from experiments with my Tesla coil.
Also something to note is that increasing the spark gap on the primary side of my Tesla coil increases the available voltage on the secondary output. It's like an air resistor is the opposite of a carbon resistor. Since a carbon resistor would lessen the output on the secondary. It's just little facts like that, that give you clues on how to put something together out of the ordinary.