Most of the time I use the Little Girl as my vanguard. Not sure about how a Predator should behave, but if you're weak enough (has low HP and low PV) don't engage the enemy by yourself in close combat. Though, being a melee class, you would want to fight in close combat, so get some equipment with CON and PV (even if you prefer evasion, in my opinion DV is useless early game).

For ranged attacks, I'd rather not use gun since the skill Firearm trains is PER. You have good DEX, so use DEX-based skill like Bow, Crossbow, or Throwing. But well, thats just an initial stat and can change in the future.

For combat, you can go to the story dungeon 'Lesimas', the monster there in first few floor should be easy. Puppy cave is also an option, but the enemy is pretty random and can be strong. Or you can gather gold by doing 'job', check the job board in Town, watch the difficulty. Harvest time job should be pretty easy and requires no combat at all.