Red/Blue/Yellow is something you really don't want to start with (at your current level). I think starting out a hack based on Gold/Silver would be a much better idea so you'd get the hang of hacking in general easier.
To answer your question about scripting; no scripting language for Red/Blue/Yellow even exists. To understand how events in those games work, you'll also have to understand how GB's z80-processor works.
Just wanted to say that your game has inspired me to make my own game based on the red blue versions. So do you know of a way to script for red version. I tried zophars domain but the tools that they had were not for windows 7. Thanks