Can I apply vitamin c serum after applying tretinoin microsphere gel, as a moisturizer?

After I applied the tretinoin microsphere gel, can I apply vit. c serum as a moisturizer? And, if I apply vit. c serum first, wait 20 minutes, then, apply tretinoin microsphere gel, and then, apply a moisturizer, like argon oil? Thank you very much, doctors. Bobby Dan.