In looking at a pitcher for our program, I try to think about pitchability now and in the future. Will this kid be able to get outs at our level. Also, how much can he improve and what do I think his "ceiling" is in two years. Can I move him on to a four year school or professional baseball.
As far as pitching goes, I love to see guys with command of a second and possibly third pitch. Not just throwing it for strikes, but throwing something offspeed on a 3-1 count. That kind of confidence in the pitch. At the junior college level, we tend to get either guys who throw with high velocity and need to learn how to pitch, or guys who can pitch but need to throw a little harder to get interest from the big boys.
If the talent is there from a highschooler, then we want pitchers who are willing to work hard and put in the time it takes to get better. It sounds as if you have that part down.
I would start to contact coaches now and ask about availability on next years team. This will give them time to see you and ask the right people about you. If writing, tell them the important stuff but not too much. Stats are o.k. but keep in mind that if we have not seen who you played, those stats tend to not mean as much, such as "I did this against this team" or "I led my league in this". Top velocity reading, average velo. reading, height, weight, 60yd times, strike to ball ratio(strike pctg.),walk to strikeout ratio, and groundball to flyball ratio are good if you have them. Include things like grade point average, rank in school, act or sat scores.
Hope this helps.
P.S. We played a team in St. Louis, Mo today whose catcher was also from Australia. I know it's a big country but still a coincidence.