TBH you won't need a month to tell if you like the game. Either you can put up with the repetitive boredom accompanied by frustration as you get picked on by whichever idiot happens to dislike you or you don't.
I played for three years, mostly because when the game first started, there was a balance between the PvP and PvE aspects of the game and there was a challenge to be had in rasising the first billion ISK to buy a battleship BPO. Over the years PvP because the sole reason to play Eve, and thus I stopped playing. A game is no fun if a random idiot can come along and kill you whenever they want.