We are not under the law, does not mean u should break the law (natural and divine law) i.e the commandments of God.
Jn 1:17 for the law was given by Moses but grace and truth came by Christ Jesus. If u are leaving on grace alone, u are standing on one leg , because grace and truth goes together.
Grace does not cancel the law but grace position u to keep the law. Grace forgives u, so that u can keep the laws of God.
Matt 5:17-19. Jesus was making us understand that he didn't come to destroy or abolish the law but to fulfill it. When you read on u get it more clearer.
When u overdosed on grace, u start abusing the law. When u overdosed on grace, u use grace to break laws ofGod ( commit sin).
Beware of what u listen to about grace , grace is not a license to commit sin . Study the bible for yourself and ask the holy spirit to give you revelation