Choosing the correct crochet yarn is critical for the success of your project.  When just beginning choose a thicker yarn which is not too soft or fluff - yarns like mohair can be difficult to work with as you cant see your stitches as easily.   A smooth yarn will make your first projects develop easily
Crochet patterns and how to guides are everywhere.  Many of us learnt from our older relatives but for those not so lucky its not hard to teach yourself with a decent hard to guide.  Start with a simple project such as a crochet hat with a thicker yarn but once you master the basic technique the skies the limit for your creativity - check out the range of crochet patterns and yarns available