Well besides reading books, checking out YouTube tutorials and practicing it is always good to get some kind of formal training. Now if you are not in the opportunity to follow art college ( or don’t want to ) there are some options.
One of the options that I like is Lynda.com. There is a wide range of tutorial material available from Maya to 3DS Max and from Blender to CINEMA4D
They also offer free trials.
Click on the logo below to check them out