I personally would stay away from people, such as Creflo Dollar, Joyce Meyer, ect. For example, Creflo teaches Jesus won't come before your rich and that Jesus is not God. However, Bible tells us that Jesus is God in flesh ( Isaiah 9:6, John 1:1, ect). I would recommend you to stay away from any preacher that seeks after money and/or begs for your money ( Even if they claim that God will bless you if you give them money.). Bible speaks harshly against love of money and its the reason why many have shipwrecked in their faith.
Try to focus on preachers that glorify Christ, preach repentance and Jesus crucified and resurrected.
I agree with Ugly, gospel of John is good place to start.