The first and foremost thing is that ,"Don't be an Extremist"... As we usually say, "Excess of everything is Bad"... This is true in every case even when you are being confident in what you can do or what you are capable of.
Norman Vincent Peal Said:
"Believe in yourself! Have faith in your abilities! Without a humble but reasonable confidence in your own powers you cannot be successful or happy." [1]
If you have fond out what you are and who you are, then you are ready to know God even...
The words, "I Am" are the most powerful words in English because what you say after these, determine your Goals, Dreams, Passion, Motivation and Success.
Chantal Sutherland said:
"Believe in yourself, take on your challenges, dig deep within yourself to conquer fears. Never let anyone bring you down. You got to keep going."
Stacy London has his own style of saying it:
"Don't let fear or insecurity stop you from trying new things. Believe in yourself. Do what you love. And most importantly, be kind to others, even if you don't like them."
So, Don't waste your time, its precious... Achieve something because only you can do it or yourself... People who seem sincere to you are just with you because you can help them in someway... Be-Aware of the leg pullers and be ready to set your direction.
Set your Direction, Start your Journey Today... :)
References:
[1] https://www.brainyquote.com/topics/believe_in_yourself