How do you write first second and third in an essay?

How do you write first second and third in an essay?

You should use first, second, and third to show textual enumerations in your writing. Many authorities prefer first, not firstly, even when the remaining items or points are introduced with secondly and thirdly.

What can I say instead of First Second Third?

Transitional expressionsLOGICAL RELATIONSHIPTRANSITIONAL EXPRESSIONSequence/Orderfirst, second, third, next, then, finallyTimeafter, afterward, at last, before, currently, during, earlier,...