Hi Debbie,
Don't worry about sticking out like a sore thumb here. Lebanese people love foreigners and there is a huge mix of nationalities and types of people in Beirut. As for being 4'6" with red hair, well, I think they will love you even more for it : ) The most dangerous thing about living in Lebanon is probably the driving! Seriously, you don't find people worrying about the political situation, they just go out and live their lives. It is a very sociable place with wonderful restaurants but there are some negatives for sure, like the power going off and on and wrecking your electronics, or having to pay a lot for pretty lousy internet service.
Hope this helps. Good luck with your decision,
Jenn