If it's hollow, You'll need an extractor or an easy out tool. If it's broke and still solid, you'll have to drill through it, then use an extractor or an easy out. Just make sure you remove the whole fitting and work with it in a vise, not on the car. I'm sure you know a mechanic who has tools. You probably should take it to him and let him do it. It could get messy if it's not drilled correctly.