Becoming a morning person is possible as I have done it. Actually it is now my favorite time to exercise and research shows it is a great way to start your day. If you read “Spark” by Dr. John Ratey he signifies how helpful it can be to create a productive day. However, with that being said, if you have to force yourself and it proposes a hinderance on your daily lifestyle then I would bypass the morning person workout and stick to the time that best fits your habits and lifestyle!
If you have to force yourself to get that run in early, are you going to enjoy it? Will you stick with it?
My thoughts are that if your schedule permits, exercise at a time of day that feels best for you. It will be more enjoyable, less stressful and you’ll be more likely to stick with it.
By all means though, set your alarm and give it a try if you want. See how your body responds. Have as much as you can prepared the night before (clothes, food, etc.). If it feels more stressful than helpful, I’d bag it and workout later in the day!
(Not a morning person either)