Should I play this on Casual or Classic?

I'm not sure which to go with. Some people say that Casual makes the game too easy and removes all strategy, but I would hate to go with Classic and get frustrated at having to reset when a character dies (which I inevitably will do, my autism is not going to allow a character to just stay dead for the rest of the game if I can possibly avoid it). This will be my first FE game, so I'm guessing I'll be pretty shit at it.