You don't need to cheat in this game at all, Set it to easy if you are unsure until you are used to it, but this game is much more rewarding when you complete something on your own.
I have nothing against cheats per say on a single player game. I very rarely used cheats unless I have finished the game once and want to see some areas or do something I could not accomplish at all in the first play but then again it is rare.
