Done properly, nose rings and other facial piercings are fairly low-risk. As for guys and nose rings, it is entirely up to the man. They look good on pretty much anyone. Some very weak dudebros may mock them, but piercings are not gender-specific.
Also, which is the right side for nose piercing?
Universally, the left nostril is the most common place to get your nose piercing. However, other factors can influence your choice, as well. According to Ayurvedic medicine, a nose piercing on the left nostril, especially in women, ensures a reduction in pain during childbirth.