How can I keep myself awake or more present during the practice?

If you fall asleep try sitting upright in a firm chair or seated on a cushion on the floor. You can also experiment with the time of day that you practice, choosing a time when you feel less tired. It is normal to get distracted while practicing, simply notice that you have become distracted and bring your awareness back to your object of focus. Distraction is merely part of the practice.