Welcome here Hogwart!
I'm always glad to see new people who are learning Arabic like myself (I've been learning for two years now).
I'd try to answer your question, but could you tell us what you intended to say first?
For the dual, I know it is strange to use it when nothing like this exists in English. But you are right, it is used for two persons. If I am not mistaken, they do not use dual in dialects.
Here are the personal pronouns:
I = أنا
You (sing, m) = أنتَ
You (sing, f) = أنتِ
He = هو
She = هي
We = نحن
(same for dual and plural)
You two = أنتما
(same for m and f)
They two = هما
(same for m and f. but take care, the verb form change even if it is the same pronoun)
We = نحن
(same for dual and plural)
You (plur, m) = أنتم
You (plur, f) = أنتنّ
They (plur, m) = هم
They (plur, f) = هنّ