“The basic value in Kant’s ethics is that of human dignity – the rational nature in persons as end in itself. A person is a being for whose sake we should act, and that has an unconditional claim on us. This is the source of what Kant calls a categorical imperative: a ground for action that does not depend on any contingent desire of ours or any end to be effected by action set at our discretion. John Rawls corrected the basic and traditional misunderstanding of Kant’s ethics when he said that it is not an ethics of stern command but rather one of self-esteem and mutual respect. To this I would add that Kant’s ethics is also an ethics of caring or empathy – what Kant calls Teilnehmung: sympathetic participation. This is not sympathy merely in the sense of passive feeling for or with others, but instead an active taking part in the standpoint of the other which leads to understanding and concern.”-Allen W. Wood, “Immanuel Kant: What lies beyond the senses.” Times Literary Supplement. February 21, 2020.
Probably the most accessible introduction to Kant’s thought I’ve read. Also worth taking a look at the Five Best Books on Immanuel Kant.