Yes, you really shouldn't do it on your own, I mean, honestly, even though something seems sterile, you may never know for sure and could end up getting a bacterial transmitted disease, its best to get it done professionaly, but somewhere where someone you know can give you the reccomendation, getting a nose piercing, because of the nerves in your nose, its possible if it's done wrong you could lose your sense of smell in that nostril.
I pierced my own nose 21 years ago. My nose is still open nothing wrong with my nose. Its this pierceing earing that they have. You put it on ur nose tight and it works itself through. Its painful but its worth it. Ur nose dont have a big hole in it. Ask thethe beauty store for a self piercing ring its a lil circle ring with a point on the end. It works wonderful..
If I were you i'd go to a professional.. But I did it myself and it turned out perfectly fine(But i've been piercing myself for a long time). You Need: Hollow piercing needle, hydrogen peroxide, sea salt, nose stud, tissues/cotton buds& marker. First off you need your parents permission.. Sterilize the needle and your nose w/ the hydrogen peroxide on the cotton bud/tissue and rub it on the inside and outside of your nostril, jewelry, and the needle. Then mark where you want to pierce with a marker. When that's all done then just push the needle through your nostril from the point you marked, and when that's through, get the jewelry and put it in the hollow part of the needle, push it all the way through the hole until only your jewelry is left in your nostril. Then use a cotton bud/tissue with salt water on it and clean the fresh piercing. (I AM NOT GIVING ANYONE PERMISSION TO DO THIS, JUST GIVING ADVISE. I DO NOT TAKE RESPONSIBILITIES OVER YOUR ACTIONS IN ANY WAY IF YOU DO GET INJURED WHICH IS A POSSIBLE CHANCE.)