There are several benefits of blind contour drawing:

1. if you are afraid you can’t draw “well”, then use blind contour drawing. Chances are it won’t look like the thing you are drawing, and that’s ok. But you will learn and get better at drawing.
2. it is a good way to be mindful. If you are focused on doing a blind contour drawing, it’s hard to think of anything else
3. It’s a good way to shake off your bad habits that you may have picked up.

Here’s some good links to help you learn more about it:

• A very good introduction to the idea: Blind contour drawing – Wikipedia
• The Times has more on the benefits of it: Letter of Recommendation: Blind Contour Drawing in The New York Times
• Austin Kleon writes really well on it, here: Blind contour drawings – Austin Kleon
• More on the benefits of it: Blind Contour Drawing Can Help You Become a Better Artist – Artsy
• And here: Start with Blind Contour If You Want Better Drawings

(Image is a link to the Austin Kleon post)