The first step is to determine what Organization you are in. The types are Airline, Corporation, Educational Organization, Government Organization, Local Business, Medical Organization, NGO, Performing Group, and Sports Organization. You can find these by looking at Schema.org. You can find the list of more specific types by scrolling down near the bottom of https://schema.org/Organization.
If you are a Local Business, check out our guide on how to markup this type: https://www.schemaapp.com/tutorial/how-to-do-schema-markup-for-local-business/.
If you’re totally unsure what Organization you are, please contact firstname.lastname@example.org and we’ll be glad to help.