I have tried to make one before, but.....gave up. My dad tell me to use GameMaker. Later, I learn Java, but I found Java is boring and now, I know HTML and half CSS. I like websites! :) anyways, I think making a rpg game is hard, learning the programming and boring. I'm not discouraging you, but if you really want to make one, go to some programming forums, they might help you. The most important thing is you have to know programming and have a logic mind.