Hello saint of God. There was a room started not too long ago by an incredible sister who put things on the site to teach folks how to read music. I'm afraid the room is closed at the moment.
However, I would recommend that you start by going to a music store and get a level one piano book. Schaum's Method for Adults is a great one if you are a teenager or older. It will start with the treble and move you on to chording, accompaniment, everything you need to know how to read music.
I truly hope this helps and encourages you to pursue your music ministry. If there is anything anyone can help with, please holla back.

Be Blessed!