I keep falling asleep when I try?

In all fairness, I only started Focus 10 last week, and I know you’re supposed to keep doing it until you’re really good at it. But I fall asleep every time. Should I sit up while doing it? Should I keep a light on or something? The first time, I woke up when he says to open your eyes, and I did, but then I realized I had been like ASLEEP asleep the whole time… Am I doing something wrong??