It's understandable that when one pirate comes over from another game the keys may seem odd to them, and even a seasoned pirate as myself gets the keys from the many games I sample from mixed up - for example, I once spent five minutes on the docks of Nassau in Pirates of the Burning Sea because I was still trying to remember which keys I can use to run
Our dear POTCO unfortunately does not have the option of keybindings as far as I'm aware of, so the only advice I may be able to give you is try and see if some of the controls that are like the other games you've played are somewhat similar around here. If not, then just keep running around and shooting at the Undead until you get the hang of it