Generally ARMA suggests you attempt to learn from as many masters at once as is possible - I'm sure their specific training programs are designed for this, but I personally decided to focus on Liechtenauer first to achieve the basics and then branch out to the other styles by the other masters later. I have a feeling I'll instinctively call stances by their german name, but other than that it's probably the simplest way to get started without using an actual ARMA program. But, remember, the more different systems you learn the more prepared you will be, so never just learn a single system and stick to it. ARMA is right about trying to encompass all of the material available rather than sticking to a single source, it's just that I started with one (german school) and intend to branch out after I attain the more basic skills taught by all schools, just I'm using the german one as my base rather than another.
As for specific drills, I don't know any real "official" drills. Making your own works fine once you know what you're supposed to be practicing. For instance, you could make a drill on footwork that focuses on how to properly use the passing step, or any of the other steps, really. Simple repetition and practice is the key to any drill, so just pick whatever it is you need to work on (a certain footwork step, the guards, striking from a certain position in a certain manner, et c.) and do it a dozen times. If you feel it needs more work, do it another dozen times! :p
While I'm not ARMA by any stretch of the imagination, if you need any advice on how to start out before you can make it to a 1.0 (as ARMA so readily suggests!) I'd be glad to be of assistance based on my own experience. Also don't worry about getting a partner for, well, a while. You have a lot of material to cover before you have to bother with another person
