I would like to build a simple IoT dashboard with custom hardware.  My low-level goal is to display values with text or meters.  My high-level goal is to plot data vs. time.  What are the appropriate tutorials to follow to accomplish these goals?  At present I have MQTT sending JSON and the text tile can display the entire message.  It is not clear how to parse out the appropriate fields.  The tutorials that I have found must be out-of-date because they do not match the current GUI.
  
Thank you,
Mark