Step 1: Get my Free Obsidian Beginner Resource List. It includes all of the resources I wish I had three years ago to learn how to use Obsidian for school. I recommend using this as a supplement to fill holes in your knowledge as you make your way through the rest of these steps.
Step 2: Watch John Mavrick's ✨ How to use Obsidian MD, the BEST Studying and Note-Taking App for Students and University✨.
Step 3: Sign up for 3 Days To Lecture Notetaking Mastery With Obsidian and complete the course.
Step 4: Consider getting Obsidian University and use the discount code PIZAZZ to get 25% off the course at checkout.