Nationality may not be so important as the way you will treat them. Remember maids are human being and naturally want respect back. So my advice is get one who likes children and speaks decent English.

One important thing: List all the DOs and DON'Ts in a contract and get the maid to sign it thereby agreeing that she has fully understood the contract very well. Tell her that the child will decide whether to keep her or not. And of course, do not forget the probationary period.

Best of luck to you.