There are other researchers from his time who thought about electricity the same way he did. I don't remember their names off the top of my head, but I found out about one them by looking into Stan Meyer's work.

There's also Edward Leedskalnin who built Coral Castle in Florida who seems to have used the same kind of knowledge that Tesla was into.

Don't be afraid to learn a bit of math and try to dig into whatever formulas you find... That's one of the best ways to prove his theories are correct