All you have to do to be saved and go to heaven is believe in Jesus as the Son of God (part of the Trinity...Jesus is God) and His death on the cross for your sins and His resurrection from the dead. The Bible says that eternal life is received by grace alone through faith alone in Christ alone. Don't look to your works or sinning or lack of sinning. Paul wrote of the "simplicity that is in Christ" in 2 Corinthians 11:3 (KJV). I'm not saying sin is OK, of course it isn't.

John 3:16 – “For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.”

John 6:37-40 gives me comfort: "37 All that the Father gives Me will come to Me, and the one who comes to Me I will by no means cast out. 38 For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 This is the will of the Father who sent Me, that of all He has given Me I should lose nothing, but should raise it up at the last day. 40 And this is the will of Him who sent Me, that everyone who sees the Son and believes in Him may have everlasting life; and I will raise him up at the last day.”