It is written in the Bible that God the Father so loved you that He gave His one and only Son, Jesus, so that everyone who believes in Jesus shall not perish but have everlasting life.
(John 3:16)
If you believe in Jesus as your Savior, you are declared righteous by faith, not by observing the Law. As it is written:
For Christ is the end of the law for righteousness to everyone who believes.
(Romans 10:4)
Once you have the "revelation" of how righteous you are by the blood of Jesus (not by your performance), you will receive your healing effortlessly. As it is written:
Christ purchased our freedom and redeemed us from the curse of the Law and its condemnation by becoming a curse for us.
(Galatians 3:13)
You must know that sickness/disease is a curse. It's not from God. Jesus wants you well. That is always His will. Once you have the right believing (that you're not guilty anymore by the blood of Jesus), you will have the right results. God does not give sickness/disease to people to teach them lessons. You will never find Jesus did that in the gospel.
In summary, first believe that Jesus died for your sins and that He rose again the third day according to the Scriptures. Ask Him to come into your life (pray in your own words, from your heart, Jesus loves you). Then, keep on listening to sermons that are full of Jesus' blood that has cleansed you from *ALL* sin. Listen to sermons that are full of Jesus' Finished work at the cross that has made you righteous by faith (not by observing the law).
Here's a sermon by Pastor Henry that you can listen (again and again) for free.