For those who are thinking of becoming a psych nurse, there are a few different paths to take. First, with a one-year training program, you can become a Licensed Practical Nurse (LPN). Another option is to obtain a two or four-year degree in nursing, which will allow you to become a registered nurse (RN). Lastly, a master’s degree or doctorate in nursing with a specialization in psychiatry will allow you to become a mental health nurse practitioner.