Informatics needs more nurses like you! At my last employer I worked with a fantastic APN who was in her first informatics role. Your office experience and relationship with providers gives you a unique background compared to many nurses in informatics who come from an acute care background.
Because of Meaningful Use and GPRO, there are a lot of opportunities, depending on where you live. In my market (Chicago), your clinical background and super user experience would prepare you for a role implementing the same product at another clinic or health network...Career Builder, LinkedIn, and Glassdoor would be my starting search for informatics positions in your area- I'd search the major health systems in your area first to see how competition shapes the job description and requirements.