How can I get into psychology .?

I (15 F) have always loved psychology, and I’ve always wanted to be a psychologist. My hope (though I’m not sure if it’s realistic) is to end up getting a PhD in clinical psychology and work with cluster B personality types. My dream college is Stanford but I know I probably can’t get in. Researching the topic leaves me with a bunch of conflicting results. I’m curious to know if there’s any path I can take to increase my chances of succeeding with my hopes. Any specific classes I should be taking in high school, a minimum GPA I should aim for, any advice would be great. Edit: also wondering if it’d be more advantageous to go into a PhD program or try to get an Md-PhD.