[KCD2] Spoilers to main story.

So when you are in torsk and you fine the chamberlain he is sick and tells you to go to the doctor's office (Forgot the name) to make or find a digestion potion and ther is one in the chest but I cant lock pick it bc my thievery level is too low so is there a way to get keys from someone like pickpocketing a guard or something I've been trying to Lock pick for hours it too hard.