Does Genesis 1 Indicate That We Are Basically Good?

Questions about whether Genesis 1 indicates that humans are basically good and that we’ve emphasized sin too much, and how, if the heart is “desperately wicked,” anyone could believe in their heart that God raised Jesus from the dead and be saved.

• Since, in Genesis 1, God made humans in his image and called us “very good,” does that mean humans are basically good and we’ve emphasized sin too much?
• If the heart is “desperately wicked,” why does God search the heart, and why does Romans 10:9 say, “Believe in your heart that God raised Jesus from the dead, and you will be saved”? How could a desperately wicked heart do this?