I personally recommend putting most of your stat points into VIT, then DEX after that. STR is good, but doesn't help you out when you can't hit the mob. If you have enough VIT, you should live long enough to kill things. For the first few levels, I'd put 1-2 points in DEX and the rest in VIT. When one or both get too far ahead of STR, put a few points into that to catch it up some. Also, I try not to assume anything, so I apologize if this insults your intelligence (I promise that's not my intent), but make sure you are only fighting mobs that have the blue or green circle next to their name for difficulty. I know that a lot of people haven't learned about the difficulty ratings yet necessarily, especially if they're new, so I want to clear that up too, as it might be part of your problem.
Formerly of Lakshmi, now in Asura