Explanation of usage and reference to tutorial

README.md

-# Building Physics Catalog Editor
+# Building Physics Catalog Data Model and Editor
 
+**Important: This is a prototype and work in progress!!**
+
+## How to Use
+
+1. Ensure Java 11 or higher is available (if not, install AdoptOpenJDK 15)
+2. Install Eclipse Modeling Tools, version 2020-09 or higher
+3. Import all Eclipse projects in this GIT repository via `File -> Import... -> Projects from GIT -> Clone URI`
+4. Refresh and clean/build projects
+5. Open `de.hftstuttgart.buildingphysics.application.product` and in `Overview`, section `Testing` press `Synchronize` first and `Launch an Eclipse Application` second
+6. Press `New...` to ceate a new empty Building Physics Catalog; Save and Load buttons are also available.
+ 
+## How to Create
+
+Find background information about parameter catalogs for simulation and a tutorial on how to create them at [https://transfer.hft-stuttgart.de/gitlab/neqmodplus/parameter-catalogs-for-simulation](https://transfer.hft-stuttgart.de/gitlab/neqmodplus/parameter-catalogs-for-simulation).