Matt - I disagree. I think he needs to learn the basics before he tries reading an Organic book.
I'd start with a regular Chemistry book. I think mine was by Hill and Petruchi (or some spelling thereof). My organic book is by Marc Loudon.
I'd see what you can find for cheap on
www.half.com
The lines you see in a structure represent a covalent bond (electron sharing) between 2 carbons. If you see a single line, that is a single bond (one set of 2 shared electrons). If you see a double line, that is a double bond (2 sets of 2 shared electrons). Same for a triple line.
The basic backbone of an androgen is the 4 fused rings (3 of them 6 carbon, and one 5 carbon - with intermediate shared carbons).
If you have no idea what I just typed, do get a regular chemistry book first, you aren't ready for an organic book.