An ABS is always the most difficult battle system, no matter if you're using scripts or events.
A few of the scripted ABS are on the master script list, but they require experience with the editor's option before they can be used.
There are ways to make an evented ABS, but that is very limited due to a lot of restrictions - for example you need to handle enemy HP by variables, which limits the number of enemies on one map.
I think there are only partial tutorials on how to make something evented (like how to fire an arrow by events), nothing I know of goes the full range. That is because most people who want more will go to the scripts, but if you're completely new to the editor that might be too difficult to understand.
In that case I would suggest making a default game first (purely to learn the engine) before going there.
You might want to follow the link in my signature, I put a lot of info for new users together in that topic.