It's not really difficult. But atleast for me it's a bit of a mindfuck at the start because it's different than any other game I played. But it's not that complicated after like just doing the tutorials that are in the battle arena.
It's not a traditional JRPG battle system at all, it's more like mini-SRPG battlesystem. It's not easy easy though. It was a blast for me 20-25 hours. But for me it ran out of steam at the end the last 15-20 hours. Also I found the humor more entertaining than the story. Because the story was just akward... which also takes place at the end... I found the start much more refreshing and entertaining than the end. I'd rate like the start a 9.0 and the end a 7.0-7.5
They give you basically all the abilities at the start. But the battle system doesn't really evolve and it gets stale imo. At points later it actually devolves for a little bit. The battle arena environments that you'll spend most of your time in is bland.
Still though, there's good humor. Good Music. A great battle system. And a really interesting JRPG, with flaws and more flaws that I mentioned.
I'd give it an 8.0/10
I bought it for 30 and it was worth it.
