Devilish Piercings? It's just style! Right?

Well, long story short my parents don't want me to pierce anything because somehow they connect it to the devil trying to take over my life. I get straight A's in honors and AP, but do like gothic culture (I'm black lol). This is all I want (note that there aren't facial piercings): industrial on my left ear, double or triple helix on my right ear with a spiral going through it, and my navel. How can I convince them to let me get my piercings done? And also what order shoud I get them and how many holes can I get in one sitting? Lol thank you in advance.