The only way you can help yourself is if you understand who you are.
“As you learn who you are, you gain confidence in your strength and also learn your weaknesses” – Angela Brit.
Identify your strength and weaknesses. Then use your strengths to work on yourself.
Learning about you won’t happen overnight.
I recently read that when you are trying to overcome a negative self-image, and replace it with self confidence, your greatest enemy is actually yourself. Stop being so hard on you!