Okay, I know I'm a bit dumb here for asking this, but seriously, how the heck can I increase CHA? I've gotten all the possible CHA I can get from the bath house.

one way is go to the bath house, and I already forgot this way can increase how much CHA. The other quick way is spend 100 coins to buy an golden apple in the market, and thats the only way to increase CHA at the beginning.