Being filled with the Spirit doesn’t mean God is going to change our personality! It means He empowers the obedient Christian to tell others about Jesus as He provides the opportunity — and He does it through the personality and gifts He created us with!
How do we receive this filling of the Spirit? Surrender our will to the Lordship of Christ! That’s all it is! The filling of the Spirit is nothing more than saying, “Jesus, take control of my life, empowering me with your Spirit to live and work for You.”
Then step out in faith and begin ministering. When you sin, confess it then ask Jesus to resume control of your life — and carry on.