Ask yourself:

What is my current level of professional experience? What connections do I have in my industry? Can I leverage this particular experience into a profitable blog? If I could pitch any website in the world to contribute a guest post, who would take me seriously from the start?
To build a truly successful blog, you first need to build influence. And to build authority, you need to step outside of your comfort zone and leverage your connections, professional experience, and everything at your disposal like never before.

You will also be performing a lot of outreach to make new connections.