Working Full-Time and Studying Is Draining Me

I work 9 to 5 every day except sundays, and by the time I sit down to study for my PMP exam, my brain is done. I really want to pass on my first try, but I’m struggling to stay consistent. I’ve been thinking about structured online PMP exam help just to keep me on track. Did anyone here use a coach or guided program? What made the biggest difference in your preparation?