Ofcourse, to become an obstetrician you've to go to medical school first and then do a mandatory residency training in Obstetrics and Gynecology. I'd suggest, since you're in college, do get involved in some kind of medical research project. It doesn't matter what you choose for research at this stage as any medical research will boost your resume and chances of getting into a good medical school. I'd also recommend to do medical social work if you have time. You can volunteer at any hospital. It'll be a good experience not only in terms of learning but you'll see and interact first hand with medical professionals. Thinking of medical school is intimidating but hey there are thousands of students like you who choose this profession and get through it. I'm sure you've got the passion and resilience and you'll do it, just keep working towards it. In my experience it's the most rewarding profession, at the end of the day you've no regrets. I hope these help.