I agree with
@AquaEcho to try the demo project of Chrono Engine first and mess around with the project file.
When you got a rough understanding on how Chrono Engine is used and set up, I recommend you copy over the Tool Map from Moghunters demo project of Chrono Engine to your own project, put the ChronoEngine.js file into the plugins folder of your project and then add the correct ''Tool Map ID'' for your project within the Plugin parameter. After this, you might want to copy over the Database entries from Chrono Engines demo to your own project. Skills, Items, Weapons, Armors and Enemies. However! If your project is already very advanced and you have added a lot of things already, just copy over the notetags for each individual skill, item etc. otherwise you will overwrite your work.
Let me tell you this much in addition: It will require patience and a lot of time to get used to any kind of battle system plugin you will use.
But one positive thing: Chrono Engine is by far one of the easiest battle systems to set up and work with.
There are plenty of other battle system which are way more complex and require way more work to understand and make them function according to your likings.
Chrono Engine alone is already great, but you want to copy over some other plugins used in the Chrono Engine demo version. CharPoses.js is one of them. Also ''treasurePopup'' and several others.
CharPoses is important to animate your sprites having some nice little attacking, defending or other types of animations.
But anyways, it will take many hours / days or even weeks to get comfortable using this plugin to its full extend.