You can reset your skills and reset your stats in Diablo 2.
While Diablo 2: Resurrected offers an array of quality of life changes to the core experience, the ability to reset your skills (also known as respec, which is short for Respecialization) remains the same.
This page explains how to reset your skills in Diablo 2: Resurrected as well as how to reset your stats so you can have a fresh start.