what does kant mean by a good will and how does he argue that it is a good will rather than the consequences

Prompt: What does Kant mean by a “GoodWill” and how does he argue that it is a good will, rather than the consequences of an action that determine the ethical worth of an action? How does Kant get from acting out of a good will to the categorical imperative and treating people as ends in themselves, as the basis for moral decisions.

This paper has to be at least 500 words pretty much explaining what Philosopher Immanuel Kant is trying to say WITHOUT using in text citations.