XP because it's the shizm shazm. It's the only one I know how to use, and it has a really gentle learning curve. You don't need to learn scripting right away, just make sure you have the general idea fully understood before you attempt scriping. I'm working on my fourth game and I haven't needed to use scripting yet.
RM Xp has a really gentle learning curve, or at least for me it did. Xp is really user freindly. I completely reccomend it..