I´d very much advice you to watch dvds as its the media which works best - for me at least. but don´t make a haste. if you are at the very beginning just get an understanding of basics befor moving on to complex organic forms. but.. I started with humans too, so it´s your choice but I can tell, if I had done more houses and such it hadn´t take me so long to get a good feel for working with geometry in 3D space.