Create an Animation

I'm creating a short film called "Power Hugs". In the film an angel has come down from heaven to help a select number of people who are in dire need. She comes to earth disguised as a poor Russian-style babushka. While here she is mute, but possesses the ability to change these people just by giving them a powerful hug. At the end of the film she travels out to the desert (where her portal is) and in a very powerful - exploding with light transformation, she morphs into her true angelic form. She then rockets off the desert floor up into space...presumably back to heaven. I will be shooting with my actor tomorrow in front of a green screen where she'll be acting out her part of the transformation. I need someone who can take it from there...