How to Be an Expert in Statistical Methods

I was actually coding the things that I was reading about and just blindly using someone else's work, and also running simulations of the different statistical methods. So for example, you can take a T test or a Z test, and you can in like 10 lines of code, code a simulation which would tell you the performance of this test under varying conditions. And I think this is the best way to understand any statistical method that you are looking to apply in your work. If you have a little bit of a coding background, there are a plethora of tools out there that you can use free tools, including like R, Python.