So you want to get a piercing but you don't want to get impaled and infected. This video walks you through the do's and don'ts when looking for a great piercer.
Choosing a piercer can often be hard to do especially if you live in a smaller city without many reputable piercers. The best thing you can do is to ask questions, make sure the piercer is knowledgeable and has a good understanding of the piercing you want, has a good portfolio with many different piercings, the shop is overall clean and sterile, and that they use an autoclave on all jewelry, needles, and tools. If you feel uncomfortable and uneasy about a shop or piercer, then just turn around and leave, there are tons of other places you can go. Your instincts are usually the best way to judge if you should follow through with a piercing or not, so just use common sense and you should be fine :)
Feel free to hit me up if you have any questions about piercing, ear stretching, or mods in general, I would be glad to help.