You could start right here. There are LOTS of tutorials for beginners in the tutorial section such as these:
http://www.quiltingboard.com/tutoria...l-t6460-2.html
http://www.quiltingboard.com/tutoria...ded-t7358.html
http://www.quiltingboard.com/tutoria...les-t8342.html
http://www.quiltingboard.com/tutoria...s-t180442.html
The more your search and read this board the more you will learn.
Google is also an excellent tool.
Learn the basics such as a four patch, a nine patch, half square triangle,
quarter square triangle and flying geese.
You can check quilterscache.com for all kinds of free quilt blocks.
They are classified in alphabetical order, size and difficulty.
Have fun!