I began the way nearly everybody I ever heard of - I began writing poetry. And I find that to be quite usual with writers, their trying their hand at poetry.
A man who as a physical being is always turned toward the outside, thinking that his happiness lies outside him, finally turns inward and discovers that the source is within him.
You will have to experiment and try things out for yourself and you will not be sure of what you are doing. That's all right, you are feeling your way into the thing.