Actually and Certainly are two totally different words for what u have in mind to say. For that "Currently" is the best word which means at exact time u r in that condition or else. e.g i'm currently in College (covers more broad time period), i m currently playing( like u r doing that thing at exact time). Now a days, at present both can be used for more general sense, like the example i've given for college. But these can't be used for describing ur at spot movement or anything u have been up to. Using currently is simple and contains more advantages.

I think you meant "currently". In English, "actually" means "in fact" and doesn't have a reference to time. Perhaps "nowadays" or "these days" is your best option for speaking about now in general. "Currently" and "at present" suggest something more temporary.

Currently

I am sorry, I wanted to say " actually" and not "certainly".