Hi there!
This plugin does not mess with levels the way you want. If you want a plugin like that, I can do it as a commission for you, talk to me on discord: hakuenstudio
Its alright, I found a solution on the RPG Maker forums. Its a simple plugin with a note tag that caps the class levels.
I am still experimenting and seeing how things go, so if I do need this in the end, I won't hesitate to contact you ^^
