Testing, is it the egg or the chicken?

As I had mentioned I am a beginner, with zero experience. Starting my journey with Golang and I got some advice that I should try learning TDD from the jump and since it came from someone I look up to I gave it a try. I was confused from the jump as some one who knows absolutely nothing I was thrown deep into the waters seeing thing that I didn't know the meaning of and how they worked or why the worked how they worked but after a while of learning how to write in Go by starting with the tests for my programs the pieces are starting to come together now, not all of them but just enough for me to see some progress from where I started to where I am now and it is a bit exciting can't wait to learn more and piece more together it is always fun to find out why a certain thing works they way it does especially after having used it for sometime without knowing, It gives you that aha! moment when it all comes together and makes a lot more sense now.