i don't want to waste time
What is wasting time?
Learning the basics of an engine is never wasting time.
The link in my signature goes to a tutorial that describes how to start best and how to get everything as fast as possible - and if you really follow that and work through those tutorials, then you'll need to invest about a month for that, before you even start on your own game.
If you consider that as wasting time - then sorry, game development probably is nothing for you. Because everyone who ever got even halfway into their game confirmed that this way is the best way to start in the long term.
real time combat systems (or action battle systems, ABS as they're called here) are NEVER "easy to use". They require a lot of configuration, and you need to know what that configuration is about to understand it. There are four or five different ABS scripts available, and that is true for all of them.
The first thing you have to do is to read through the link I gave you above. Here is it again:
http://forums.rpgmakerweb.com/index.php?/topic/40589-how-to-use-a-script/
Until you understand that tutorial, forget about using an ABS script.
After that, you should be able to find the other ABS scripts by searching the forum for the correct terms.