I cannot do justice to this subject but will plunge ahead in order to describe and understand what is good and what is right. If a person is following their well-formed conscience will choose the good which is also what is "right". Here is the CCC on the conscience:
1795 "Conscience is man's most secret core, and his sanctuary. There he is alone with God whose voice echoes in his depths" (GS 16).
1796 Conscience is a judgment of reason by which the human person recognizes the moral quality of a concrete act.
1797 For the man who has committed evil, the verdict of his conscience remains a pledge of conversion and of hope.
1798 A well-formed conscience is upright and truthful. It formulates its judgments according to reason, in conformity with the true good willed by the wisdom of the Creator. Everyone must avail himself of the means to form his conscience.
1799 Faced with a moral choice, conscience can make either a right judgment in accordance with reason and the divine law or, on the contrary, an erroneous judgment that departs from them.
1800 A human being must always obey the certain judgment of his conscience.
1801 Conscience can remain in ignorance or make erroneous judgments. Such ignorance and errors are not always free of guilt.
1802 The Word of God is a light for our path. We must assimilate it in faith and prayer and put it into practice. This is how moral conscience is formed.
A person who chooses what is right is choosing the good, especially if it is a spiritual discernment, for a spiritual good. All of us are given discernment as a gift in confirmation. This is merely the ability to choose with spiritual insight what is good, what is right.
To me, when one has a well-formed conscience, choosing the good would be choosing the right.
To be continued....