Google recently scanned and photographed almost all the Osamu Tezuka Manga Museum in Takarazuka. You can take a look at the scanned high-resolution images, videos and an explanation of the life and artistic evolution of Osamu Tezuka at the Google Cultural Institute. You can also visit the museum virtually like in Google Street View.
It´s always good to remember that all masters started from zero. This is how Tezuka drew as a child: