He was able to meet the other people (Male and Female created simultaneously on the sixth day after the animals and beasts before his father Adam was made) in Nod whom he thought might kill him if they see him wandering outside the garden and from there he was able to find a woman whom he had a child he named Enoch.
Read the Genesis slowly and you will know that you have been fooled to believe about Adam and Eve as the first people on earth.