Do you see a man skilled in his work? He will serve before kings; he will not serve before obscure men. (Proverbs 22:29)
The task that you think is difficult maybe easy after all. Just a few steps of learning and there you are. Another skill will be added to your life. But if you do not try or take a single step you become a failure. Failures are not them who try and fail, but them who fail to even try. David was willing to learn and he was transformed from shepherd to shepherd king. It took a while and several heartbreaks, but succeed he did.
Once he felled a giant with a sling and a stone, but then he learned to fight and war with sword and shield and he was victorious then too. For a Christian believer, the Holy Spirit is a good teacher; he not only teaches us the ways of God, but he is there as Counselor to guide us in our daily tasks too. God who sent his Spirit on men in the Old Testament to fight and win wars also anointed men then with special skills to achieve other purposes, like we read in the book of Exodus......Then the LORD said to Moses, "See, I have chosen Bezalel son of Uri, the son of Hur, of the tribe of Judah, and I have filled him with the Spirit of God, with skill, ability and knowledge in all kinds of crafts - to make artistic designs for work in gold, silver and bronze, to cut and set stones, to work in wood, and to engage in all kinds of craftsmanship. (Exodus 31:1-5)
God can empower you with the Holy Spirit in the daily work or job that you do. Do you think you are a failure when it comes to your job or the work that you do? Pray to the Father in heaven to pour out his Holy Spirit on you. He gives to them who ask. The Holy Spirit of God can empower you like no one else can. As you give yourself in the Spirit's hands, he will do great things through you. You will be a changed person. No more a failure, but a success. And the glory will be God's.
If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him! (Matthew 7:11)