Welcome to DV!

1.- Depends on the person, if you try it after first going to bed though, it can take hours and not happen... I hear that the average after waking up in the night is like, 15mins?

2.- Well, you can change the hallucinations if you wan't to, like imagine something funny instead of something scary, pretty much what BigFan said.

And for a tutorial on WILD: http://dreamviews.com/community/showthread.php?t=66238