The Lord is our confidence, He is strong and mighty. He sees to our every need, He leaves nothing undone. Jesus told us to ask in His name, when we ask anything of the Father.
1John 5:13-15 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God. And this is the confidence that we have in him, that, if we ask any thing according to his will, he hearth us. And if we know that he hear us, whatsoever we ask, we know that we have the petitions that we desire of him.
So if you lack confidence in yourself, put your confidence in Jesus, he has lots of things to show and give you, concerning his word.

Father, I pray for those who struggle with lack of confidence, I pray that they will receive the word that John gave us and learn to put their confidence in Jesus. Teach them Holy Spirit to spend time in the word, and find out what your will is for their lives. In Jesus name we pray. Amen