I would start by taking a look at the starred, sticky notes at the top of the Board. There is a huge amount of information there -- everything from how to handle Lantus (it's different than N -- no rolling or shaking), key concepts like the depot (or "shed"), our dosing protocols, and everything for the new Lantus user to know (e.g., how to do a curve, our slang, posting conventions on this Board).
I'd also suggest reading any of our condos (i.e., the thread each of us open daily -- one condo, per cat, per day) that look interesting to you and to take a look at our spreadsheets. Reading the discussions -- and socializing -- is a great way to learn.
And, ask questions. We love questions. The front end of the learning curve is a bit overwhelming and the people here are very generous in sharing their experiences.