Get together everything you need. You may want to have an old towel on hand that you don't mind getting paint on or some paper towels. Also a cup of water for keeping your brushes clean.

Tape your picture to the inside of the glass. This will be your guide line or you can free hand.

Begin to paint. I waited for the paint to dry before I painted on the details like the face and leaf accents. This way I didn't smudge what I already painted.

When you are finished painting the glass wait until it is completely dry.
In a well ventilated area (outside works best) flip your glass upside down and with your Mod Podge Acrylic Sealer spray and even coat all over your glass. I did three coats waiting about 15 minuets between each coat. Allow to dry for at least 24 hours before using/washing