Yes, you most definitely can. You can do severe and even permanent damage if you are not careful and try to rush the process, or execute methods without first learning how to do them safely. But, it's no more dangerous than going to the gym and trying weights for the first time. There's increased risk of injury without instruction and guidance, hence why Total Man is here and our Video Library exists.
We encourage all customers and to watch all of the relevant video content before using a device to prevent injury, and also maximise results.
Don't break your dick!