As a general rule, youre absolutely right – person is used to refer to an individual, and the plural form is people. As you have said, we can also use peoples to talk about different groups within a nation or the world.
Is people singular or plural?
People is the plural version of Person 99% of the time. The alternative plural Persons exists but is only used in technical language: Maximum 12 persons (in a lift/elevator). There is another noun, singular People and plural Peoples, which means nation/tribe.
What is an example of second person?
Second person personal pronouns include you, your, and yours. Examples of sentences written from the second person point of view: You should put your cell phone in the trunk if you want to resist the temptation to use it while you are driving.