I had this question in my mind way back, when I started the journey of USMLE with lots of questions like.
Which step to take first Step 1, CK or CS?
Weather to go for electives or not?
What about research?
Which books to follow?
What videos to see?
How to approach exam, which subject to study first and which later?
Which is the most high yielding subjects and things to be done?
and many more.
When you google, any of the above question, you are going to find plenty of answers which will be highly confusing, and will bring you to square one.