Romans 8v28:《And we know that in all things God works for the good of those who love him, who have been called according to his purpose》

God is able to turn your imperfections into something good . What are those imperfections you are shy about or you hate about yourself ? Think about each one of them  .God loves you as you are and is going to use everything about you for his glory, like a friend of mine said one day: There is purpose in your pain, I will use that to say , there is purpose for your imperfections. 

Same thing for your history. It doesn’t matter who you have been , what you have done , God is still present and  wants you .  For instance Apostle Paul, the one who wrote the most books in the New testament, called the « Apostle of the Gentiles », the one God used mightily to serve Him; But before that, guess what,  he was a persecutor of Christians, and he was pretty good at it but despite that , God has called and appointed him over nations: Acts 9v15:《But the Lord said to Ananias, « Go! This man is my chosen instrument to proclaim my name to the Gentiles and their kings and to the people of Israel.》
Therefore, don’t also  underestimate yourself, you don’t need to have a huge background to be used, it’s not important if you don’t have an history like apostle Paul and  many others  . We can see it with Queen Esther used by God to  save the Hebrews through her beauty, presence,  courage and faith , all marinated with God’s favor.
You have your history and God is ready to use every bit of it. You can be a life changer for someone else . Just declare this I am « your name » , I am proud of me  , I am grateful for what God has done in my life , I am a Destiny Helper .