You dont have to do the 18 months at RMC to become a pilot, you can become a Specialist Service Officer by completing a 6 week course. You wont become a LT until you get your wings at Oakey.
The day of an army pilot is quite varied, there are probably very few 'standard' days. The closest thing would be Physical Training in the morning, Flight prep, fly, debrief, other duties (you may have other responsibilities such as unit security etc), afternoon orders/parade and then home. Other days may start at 1am for the right moon conditions to train under night vision goggles. Your posting locations will be Darwin (Armed Recon), Townsville or Sydney (troop lift). Make sure you are happy with these locations because that will be it for at least the first 4 years.
Army aviation is going pretty nuts at the moment, there are new Tiger and MRH90 helicopters coming into service and more chinooks, on the news the other day they announced that the Tiger will be ''made available'' to go overseas soon, the chinooks and blackhawks are already doing rotations overseas...very busy but very rewarding if that is what you want. Remember though, if you cannot see yourself flying a helicopter looking through night vision goggles with people shooting at you, jetstar maybe a better option.