Trial got me to buy the game: Quick Question

Played an hour of the trial, and I'm sold. I did, however, play on Explorer mode. I don't really care if I play on the easiest mode since it's my first time playing an RPG EVER.

My question is: Is the balanced/Medium mode THAT much harder? Is it a more rewarding experience, or is it one of those games where I can just play the story, have fun, and call it a day?