The Wikipedia entry has a pronunciation guide:
English: [bɑːrsəˈloʊnə]
Catalan: [bəɾsəˈlonə]
The first a is a schwa and the o isn’t rounded. Honestly, it looks quite similar to English, to the point where there might be some English dialect that sounds exactly like that.
It ends up being complex, but it doesn’t start that way.
These games are very long and the mechanics are slowly added in tutorialised fights spread out over the story.
In practice this means the battles are dead simple for the first ten hours of gameplay, you’ll be 40 hours into the game and still get tutorials.