Blender Artist is a good site to learn about the program.  The other members are very know a lot about Blender, even some of it hidden tricks, they can be a bit cranky though.  BMesh is a project to try and add n-gons to Blender.  The thing to pay attention to when modeling is the topology, how the edges flow, n-gons are useful for editing that but if plan for it in advance you can get by without them.  The planning in advance is my biggest weakness and is why I only have a handful of projects done and about three times as many in various stages of development.  Wings 3D can handle n-gons and a lot of what you learn in it can be applied to any other modeling program, it just the interfaces that are different, many have pretty much the same tools just applied a little differently.