Hi, there. Welcome to the forums! Congratulations on passing NCLEX.
Although you recently passed NCLEX, you are no longer a new grad because you graduated more than three years ago. I'm going to be blunt and mention that you have several things going against you.
First of all, the national economy is in a slump, and nursing jobs have been affected. Secondly, HR managers and recruiters are going to be suspicious of the nurse who graduated three years ago and has no paid nursing experience. Unfortunately, you are no longer considered a new nurse, even though you do not have experience other than the volunteer position.
In addition, the DFW job market is glutted with new nurses because there are so many nursing programs in the area that pump new grads into the employment pipeline every few months: Texas Christian University, UT Arlington, TWU, El Centro, TCC, Weatherford, TVCC, Hill College, Southwestern Adventist, Collin County College, Dallas Nursing Institute, and many more.
I will also mention the fact that nurses who are originally from out-of-state have been relocating to DFW over the past two to three years, which saturates the job market around here even more. I'm originally from California. Since I have been living here, I have met nurses who moved here from Iowa, Virginia, New Mexico, Oregon, Mississippi, Georgia, New York, New Jersey, New Hampshire, Missouri, Utah, Oklahoma, Kansas, Michigan, Pennsylvania, Florida, Louisiana, Ohio, Arkansas, Arizona, Colorado, and other states.
In this economic climate, it is unlikely that you'll find an internship since three years has elapsed since you completed school. You are competing with grads from the classes of 2010, 2011, and 2012, and it seems that everone and their mama wants the exalted hospital position. I didn't say that it was impossible, but it is very unlikely.
I would personally start applying at home health companies, nursing homes, hospices, private duty agencies, clinics, doctors' offices, psychiatric facilities, and group homes because these settings are more open to hiring inexperienced nurses. Local hospitals are receiving several hundred applicants for every position open.
Good luck to you!