A few things to consider when thinking about FedRAMP. You will need a production, test and remote systems (hardware, software, infrastructure). You will need to understand details around hardware, software, location, and processes. You will need to get the environment approved and re-approved at least annually.
Be prepared. Consider enlisting an experienced 3PAO to help you develop the paperwork so that the inspections go a little easier. Be prepared for several meetings with the 3PAO, GSA FedRAMP Office and the JAB. Be patient, and celebrate the day you received FedRAMP.