Here is the gospel: That God created mankind and gave everything mankind would ever need. God is love and by definition He gives. He only asked man to trust Him. Man decided to follow himself and because we do not trust God we follow our own path- blindly separated from our Creator. There is nothing we can do to come back to the Creator because we would be trusting ourselves. So, God demonstrates His love through grace. He gave the only thing valuable to Him- His Son Jesus to become the very manifestation of everything between man and God and then die for that separation. All those who trust in this promise from God will reconciled to God once again. This begins with a simple conversation between you and God where you acknowledge your need for him and a declaration that you are trusting His plan and gift through Jesus Christ.
Here are some videos about the gospel: