Can someone who is currently a psychiatrist help me with picking majors and what classes to take?

You can major in ANYTHING as long as you take the premed classes. Psychology is fine, but not required. When you enroll in a college, you'll meet with an academic adviser who can tell you specifically which classes satisfy the premed requirements - every school offers them. You'll be earning an MD (medical degree) from med school after college, not a doctoral degree (PhD) which requires grad school instead.