It can be easily noticed if someone is Self Confident or not by the way they move & walk. So if you want to 'look self confident' you should walk with your head up & straighten your back. 

Observe the way you usually walk first - if you were walking like someone who 'Isn't Self Confident Yet' - that is: sloaching, looking at the floor or 'sending a message 'Don't look at me' or 'I don't want to be here' or 'Idk what I'm doing here' by as shy movements as if you were trying to 'hide from someone' or from the Whole world - you need to work on 'Self Confident Way of Walking' next. 

🔷 So remember: walk with a Straight Back, Holding your head Up & looking Right in front of Yourself! :) ... - Cause when your body will say 'I'm Self Confident' by the right way of moving that shows it - Your Mind will Also Start Believing That! 😁👍👍