Grandma is an American citizen. Can I apply for immigration?

First priority

That is, unmarried children of American citizens (age 2 1 or above):

Second priority category a

That is, spouses and children of permanent residents (2 1 under one year of age):

Second priority category b

That is, unmarried children of permanent residents (2 1 over one year old):

Third priority category

Married children (of any age) of American citizens:

Fourth priority category

Brothers and sisters of American citizens (of any age):

You don't belong to any appeal category.

Besides, you are over 2 1 year old, so you can't be regarded as your father's escort family.

I need your father to apply, and then you can apply ...

It takes a long time, so consider other ways.