im a lvl 4 barbarian with 954 hp and 25 mana

4 to 49 attack and 6 to 19 defence

is that a good person for lvl 4

That way more life than you need. Look on the market and buy a tier III weapon and plate mail with over 30 enhanced effect and you'll be doing a LOT better.

well i go in the catacombs and i take all the hits

But you'll be able to solo from 1 - 15 way faster than you can catacomb it even with mediocre gear.

And if you have enhanced effect on a plate mail you'll take a whole lot less damage.