How do I pave a pathway to becoming a Obstetrician? Is it possible for me to get my bachelors in nursing while getting my pre-med requisites? What are the steps to becoming a Obstetrician?

I am a junior in high school who is also planning to graduate high school with a LPN and I want to further my education to become/work as a BSN RN while studying to become a Obstetrician but I don't understand how to become a Obstetrician or the steps to become one. Some tips would really help me.