American relative immigrants F3 children are over age.

You have to wait for your mother to get a green card before you apply.

It takes less than eight years to apply for a green card for an adult unmarried child, during which you can't get married.

Otherwise, you will be disqualified, because the green card is not eligible to apply for adult married children.

This is basically a long way off, but if you want to immigrate legally, this is the only way.

Or, your grandfather and your family will find you an American citizen to marry.

If all goes well, you can come to America in almost a year.

This is the quickest shortcut for legal immigration.