That’s going to depend on your setting. In a modern one, you’re looking at a crowbar (yes, that word has come up a lot today), hatchet, or claw hammer. If it’s a medieval setting then a crowbar will be a bit tricky to obtain, though hammers and axes should still be available.
For traditional forms, the staff is usually regarded as the easiest weapon to train on, though, there’s a huge jump to get that far, as opposed to things like a hand axe.
Just remember, if someone else brings the shotgun your character passed up, she will die.