http://www.djqwest.co.uk/fruity/

^^^
Fruity Loops tutorial.... I don't know why so many people have trouble with Fruity Loops, just mess around with it and you'll figure it out. First thing I would do is find better samples for drums and other instruments that sound more realistic.

Then check this out:
http://www.hieroglyphics.com/features/beats_101/

^^^ Helps you figure out how to construct beats and pull out smaples for melodies, not just beats.