Hello Zahra and welcome to the Abu Dhabi and Ruwais forums

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Sorry, I'm afraid I don't know much about
Ruwais. It's a small town that mostly supports some petrochemical industries in that area, and is quite a drive from Abu Dhabi. You might consider trying to get a live-in maid from an agency based in Abu Dhabi where there's more choice. Forums like abudhabiwoman.com have a good bit of activity and could be helpful for you.
SABIS schools generally have a reputation of being quite rigid and demanding, for both students and teachers. If you search through some of the other forums on the internet, you should find a few comments that might be useful. Choueifat certainly attracts its fair share of complaints, and the
SABIS PPP in Abu Dhabi certainly came in for some flak, but the
Ruwais Choeifat School might be a little more easy going as it's out in the sticks.