These two apply to the latest version, most of the rest are for older versions of Fritzing. In general documentation is lacking so suggestions for improvement are welcome.
The way I learned was asking questions here, but there were more folks that had been with Fritzing for a long time posting here then, and most of them have now fallen away. When you hit problems feel free to post the .fzpz for the part or a .fzz file for a sketch and we will have a look.