American lineal relative B immigration .. problem ...

Holders of American green cards are considered permanent residents.

Applying for a green card is slower than holding American citizenship.

There is no way to arrange the time. Maybe 2-3 years. Maybe more than three years.

While your mother is applying for your green card.

Your mother will apply to become an American citizen then.

I will also change my citizenship to apply for you to come to the United States.

When notifying the visa, the most important thing is to bring all the relevant documents and the documents and materials that the consulate should bring.

Don't be nervous when asking questions. Be natural. Usually it will pass.