This matter is best handled by privately consulting with an attorney.

What can i do?

If there is abuse involved, a VAWA petition might be an option. However, it is advisable to privately consult with an experienced immigration...

It is advisable to retain an attorney to accompany you.

Can I quit from my F-1 status after receiving notice of action for concurrent AOS filing? Will it have impact during interview?

It is advisable that your spouse maintain lawful status. That's the safest way to go about it. However, I advise that you privately consult with an...

Can I mail N-400 from outside of USA ?

You can. As long as your physical presence requirement has been met.

What’s can I do?

All you can do is ensure that your petition is filed with strong evidence that the marriage is bonafide. You might want to consider using an...

Name change after F4 petition was accepted.

I agree with the previous answers. Submit evidence of name change to NVC and a request for the change of name.

Can I apply for fiance visa while N400 is pending ?

No you have to wait till you become a U.S. Citizen.

GC sponsorship for Mother?

Consular processing is faster and eliminates intent issues. However, this is the sort of matter that is best discussed in private with an...

Can I get child support if the dad get deported back to Guatemala?

Have you filed for child support yet? If he is deported, the issue won't be so much as to whether you can get an order for child support in your...