Assalaamu alaikum,

brother if you are married in a non muslim law you need to get divorced in that law. And remember, a muslim woman is not allowed to be married to a non muslim man, the marriage becomes null and void. But you should really talk to a scholar. Why not go to fanar and ask there as they will know what to do.

wasalaam

Dawud

P.S, marriage and divorce in qatar is very difficult/annoying, you are better off doing it in another country