At a very minimum, you have to believe what the Bible says about the person of Jesus Christ...His life, His death, His ressurection, that He is the second person in the Trinity, and that He has the power to forgive your sins.
As a Christian, a believer in Christ, do you believe and hold that the Bible is the Word of God, revealed to mankind?
This is a very important question to you and serves as the basis for the remainder of any possible discussion. Waiting.
For the record, I am a Christian, who believes we should do as God/Jesus/Holy Sprirt calls us to, walk by Faith and not by sight.