A protagonist is the main character of a story. The protagonist is at the center of the story, makes the key decisions, and experiences the consequences of those decisions. The protagonist is the primary agent propelling the story forward, and is often the character who faces the most significant obstacles. Wikipedia
So HOW your protagonist will accomplish all that depends on the character you create. It’s not just about physical characteristics; it’s also what’s inside that character’s head and heart, what’s happened in the past and what he/she hopes for in the future.
Today’s prompt? Write two paragraphs: the first describing your protagonist’s physical environment—looks, physical attributes, background, current situation/job/location, etc. The second describing details of the past that have shaped that person and hopes for the future.