Here are some tutorials and stuff to help you out:
http://www.flstudio-tutorials.com/tutori als.php - great tutorial for beginners.
http://flstudio.image-line.com/help/ - the official manual for FL Studio. Not good for beginners, but good if you want to look for something specific.
http://nucleocide.net/tutorials-fl_studi o-fl_studio_mixer.htm - a brief but useful definition of FL Studio's mixer and its capabilities.
http://blackhole12.deviantart.com/art/Sy trus-Synth-Creation-Part-1-75704794 - An in depth, easy to comprehend, 7 part tutorial by Blackhole12 on how to make synths with FL Studio's Sytrus plugin.
http://www.blackspherestudios.com/submis sion.php5?id=359 - An intermediate guide on how to use FL Studio's Parametric EQ and FL Spectroman by Blackhole12 as well :P
Plus, you can get more audio help over here and there's a thread for posting questions about FL Studio.
There... that should help you out :3.