Although I am not a midwife its my understanding that you must get a bachelors degree in nursing and masters in nursing and then do clinical internship time and take certifying examinations along the way. Four years for a bachelors degree (may take longer depending upon what you decide to major in) one year of nursing experience, and three years in a nurse midwifery program. This may even take longer should you want to be certified.
You would need a masters degree in nursing. I am a labor and delivery nurse and I think getting some experience after getting your bachelors degree before perusing your masters in midwifery is a good idea!
Must be a RN with BSN then obtain a nurse midwife certification
Dr. Khona is a highly qualified physician who gave spot on advice (thank you). Attached is simply a link that may assist with some of the specifics:
Best of luck in all your future endeavors!