Nursing School question, PAX test

For the moms out here who went back to school after having kids and chose the nursing path, what is the most challenging part?

I feel lead to go back to school for nursing. I am 30 years old and have not nursing experience. I have have wanted to be a nurse since high school. My question is, how would I pass the pax text since I have been out of school for 12 years? I'm so nervous.