Actual is very different from current and present.
Current and present refer to things happening now (not in the past or future). Actual refers to things that are true (not things that are false).
Now, what about current and present? These two words are usually the same. Sometimes, current is used in the sense of “generally now” and present is often used more in the sense of “immediately now, in this place/moment.”
At present always means “now.” But there can be some confusion with the word presently, which can mean “now” or “very soon.”
You can know which meaning it has by the verbs: if presently is used with “will,” then it means “very soon in the future.” If presently is used with “is/are” or other verbs in the present tense, then it means “now.”