ANY GOOD RGSS TUTORIALS???

I've recently bought Rpg Maker VX ace and it seems really simple and amazing. However, I would like to create my own battle systems, and I don't know how to do this. I remember seeing a video of a FFXIII battle system example and I would like to make my own. I do know that it has to do with programming, and I don't mind putting the time and effort into learning how to program the scripts.

This battle system I want to make has the characters having their turn for set amount of time in which they can execute multiple commands. The less commands you put in, the less time it'll take for their next turn. When it becomes another characters turn, the previous character will still execute their commands as you're entering the current characters commands. I'm assuming this will be pretty hard to do, considering it involves a lot of timing. So are there any tutorials that could help me get closer to this goal, or does this battle system already exist which I could use?