Its pretty basic PvP, as others said, grab the weapons on the ground and fight. This game is mostly for the Story, PvE, and fashion.
If you want PvP you'll want to find another game, as this game does not work around it, there's a lot of solid choices so don't worry.
Sea of Thieves works very well with PvEvP, with a griefing focus, you also have the BDO game which revolves entirely around PvP, grinding stops, GvG and so.