Update README.md

Author: willtheorangeguy

README.md

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 # PyWorkout
-A simple application to keep me inspired during my workout!
+A simple application to keep me inspired during my workout! 
+
+Warning: **THIS APP IS STILL A WORK IN PROGRESS**
+
+## Usage
+Make sure you have the [Python Interpreter](https://www.python.org/) installed. 
+
+To run the app, double click on the `main.py` file to launch the command line interface (CLI), or the `Workout-gui.py` file to launch the GUI. The CLI has more features at this time, but by the end of development they will both be on par. 
 
 ## Say Thanks!
 | ![Github](https://github.githubassets.com/images/modules/logos_page/GitHub-Logo.png)| ![Python](https://www.python.org/static/community_logos/python-logo-generic.svg)| ![PyInstaller](https://pyinstaller.readthedocs.io/en/stable/_static/pyinstaller-draft1a-100_trans.png)  | ![cx_Freeze](https://pypi.org/static/images/logo-small.95de8436.svg)    |