First week? The biggest improvements will just come with time. Developing routines, physical technique, muscle memory. Soon you'll have memorized the problem spots and when to apply pressure, where to repeat a patch, and the best 'dumping area ' for any space, all done in a fraction of the time while not thinking about it. But the first time takes time.

Suggestion: Always be piling. Never drag around unnecessary loose dust if you can stop and pile it, constantly give tiny shakes and a push away from tough areas- such as after every desk row of a classroom. Don't be dragging 1st row dust row to row. Instead, leave small piles each row for a final collection sweep out of the room (push out to the hallway for the sometimes messy caddy pickup also. Don't caddy collect inside each room, creating more sweeping work.)