There is no need to try to impress others. We are all uniquely and wonderfully made in God’s image (Psalm 139:14; Genesis 1:26). We are complete in Him, (Colossians 2:10) and loved unconditionally by Him.
Trying to impress other people is like saying you are dissatisfied with who God made you to be. Be yourself and talk to your personal God. “And when you pray, you are not to be as the hypocrites; for they love to stand and pray in the synagogues and on the street corners, in order to be seen by men. Truly I say to you, they have their reward in full” (Matthew 6:5).
When praying with others, there is always a danger of being more concerned with what they think about your prayers than being concerned with the One to whom your prayers are directed. Never try to impress people when you pray and God is certainly not impressed by prayers.