What should you get an eyebrow piercing or a lip piercing?

Whichever you want. I would get the lip piercing first. Its a bit easier to care for and you can learn before you try to handle an eyebrow piercing. Eyebrow piercings are surface piercings so you have to be really careful with them so that they don't reject. As long as you're comfortable with the risks of both, I wold get the lip piercing.