Start off with what you know. My best piece of advice is to get out and comment, just like this. You will pick up some followers this way.. I don't care if you are William Shakespeare, if you don't have an audience nobody will read your content.
Go ahead and follow some people, interact with their content and let a following begin to build. If you are going to write, keep it short and simple during your start. No reason to write a manuscript when nobody is reading it.
I'll go ahead and follow you to make sure you have an audience.