FFTA Job System (editing some existing scripts)

okay so, I'm trying to set up a job system in my game that's basically the same as the Final Fantasy Tactics Advance one; basically, you have a bunch of subclasses. you start with a few unlocked, and then once you've mastered enough skills from one (or two) subclasses, you unlock some more, and so on and so forth.

I'm using yanfly's class system script, and fomar's weapon skills + ap system, because they give me the basics of what I want, but I'm not entirely sure how to edit it so that subclasses get unlocked when a character's mastered a certain amount of skills from another subclass. the only idea I've had so far is having some gross enormous nested "if" statement inside the weapon skills script, where it works out if you've mastered a new skill, to see which character has mastered enough skills in which subclass (with just a regular game variable keeping track), and then being able to unlock the next one from that, but I'm still not entirely sure how to actually work out which variable needs to be incremented, and then how to increment it.

...I don't think I'm explaining this super well, augh. anyway, if anyone has any idea what I'm talking about and has any ideas for me, I'd really appreciate it :)

This script made by forum fan-favorite Yanfly can be edited to do exactly what you want it to be. In addition, this one sets limits on classes, as to what level or skills need to be learned in order to switch classes.

I'm literally already using both those scripts, I'm just not sure how to edit it so that you need X amounts of skills in class Y to unlock class Z.

quick update to say: I worked it out! I managed to edit the scripts I was using to do exactly what I wanted :) if anyone's interested in getting this thing happening for themselves, feel free to shoot me a pm

feeling super pro right now, gotta say haha