vagos

Hello everyone guys.
It s been only 2 days since i ve been working with houdini.I never knew about it before and i got to say it s really really amazing what this software can do.However as a new user i ve got 2 questions and i was wondering if you could help me.
1)I ve created a water scene in houdini and it works.Everything is perfect.But how can i add some textures in the water to make it look more realistic?And some foam would be good.
2)How do you render a scene and save it as a video on your hard drive?

Well that s all for now.I ll be waiting for your help.
Thank you