The short answer I don't know, I didn't have teachers and my friends cannot understand this type of discussion, so their are gaps.
You might not see it yet, but I think I am learning.
Just a suggestion: don't start learning by trying to come up with a new theory. If you want to understand light, time, space, and gravity, go get a standard textbook and learn the well-known version first. This way, you'll learn a lot of reliable mathematical tools, reliable theory-testing-methods, etc., without which it is impossible to uncover (and know that you've uncovered) a good theory.
You don't want to try to learn these methods at the same time that you're trying to write down something new. First of all, you won't know what methods exist. Second, you'll make mistakes in trying to use a new method, and if you're applying it to something unknown you'll be unable to catch those mistakes. Third, you won't be able to ask for help because no one will understand you.
Go get a basic special-relativity textbook, spend six months digesting it (do all the problems). Then get an introductory General Relativity textbook and do the same thing. Even if it takes three years, this is a better use of your time than plugging away at your own theory---that's true even if your theory actually overturns GR (you'd be able to show that it works using understandable language), and it's doubly true if it does not.