I dont mean this nastly, but i suggest you start with some simple type of game, and progress onto a RPG at a later time.
I believe your out of your depth on some of the things your hoping to achieve, based on the level of understanding you have of mirc scripting.

Im sure you can get better, but a large project straight off the mark is likely to bog down and not progress.
I look at some of the first things i ever did in mirc (and im a programmer by trade) and i think now WOW what crazy thing was i doing there!