I use the "Cinema FV5" app for Android and it's fantastic. Gives you the same options as this app for a fraction of the price. It has histograms and audio meters and everything can be set manually.
"Just do it" is the best advise. Pick up your camera and film stuff and edit stuff. Then you'll get the passion, others will see your passion and things will move on from there.
Good, I'll take two :)
To name a few that haven't been mentioned before. I like DigiEffects Delirium, The foundry Twixtor for extreme slow motion work and Mettle Freeform and Shapeshifter for easy 3D extrusion.