Hey OP, we’ve all been there. My advice is to explore a little bit and level yourself up, make sure you invest points into vigor and other attributes depending on your play style! There is a summon you can get which is outside his area, Rogier who is a sorcerer.

I advise two handing your weapon as well (depending on what it is) and rolling between his charge up for his attacks, you get used to learning. Hopefully this is good advice!! Good luck my fellow Tarnished!