Best way to learn PostgreSQL after MERN stack?

I've built several projects using the MERN stack and am comfortable with MongoDB, Express, React, and Node.js. I'd like to learn PostgreSQL for web development and production applications. What resources, courses, or project-based approaches would you recommend? Should I focus on raw SQL first, or start with tools like Prisma or Drizzle? I'd especially appreciate advice from developers who made a similar transition from MongoDB. submit