This is a good YouTube channel for videos about the different missions for Hydrodynamics and troubleshooting.
Learn to program from the Lego Mindstorms website. May of the tutorials here refer to the computer version of the Mindstorm software, but the iPad app looks similiar.
The EV3Lessons.com site is full of directions!
Here are a few you might want to check out:
Learn about the sensors that come with the EV3 kit from Mr. Hino.
Simple EV3 Claw
You'll want to pause this at each of the steps to collect materials and assemble.
Grab and Lift Attachment
You'll want to pause this at each of the steps. Pay very close attention to how the gears go together.
This might be helpful in programming