I now have time for myself now but I don't seem to have the motivation to do anything. How do I be productive?

Basically, I'm home (finished my course, and post breakup mode) and I signed up for a course online and have things to do, creatively. But I have no drive to move. It's night where I am right now, and my brain is telling me to 'go to bed,' but I'm not tired. At this time, I'd be calling my childhood ex bf but now I'm on my own. I can't use my creativity, or study the thing online... I'm not being productive and I can't seem to sit still and do what I should...