You must desire to be transformed into something more like Jesus Christ for that transformation to begin. We are unlikely to put out the effort or take the steps necessary for this to happen until after we've determined this is something we really want to happen.
Becoming more like the person God intends for us to be is a slow process no matter what. It's probably a good idea to do a self-evaluation to make sure we are not the ones hindering the process. Here's a great first-step in the process. [Psalm 51:10] Create in me a clean heart, O God, and renew a right spirit within me. God's help in growing towards spiritual maturity is readily available.