I don't think it's embarrassing, you'd be suprised how many people don't know how to drive a manual! My wife for one, has no idea and I'm still in the process of teaching my sister in law. She picked it up quite quickly.
I wish alot of drivers on the road make driving a car not just a way to get around, but to enjoy the actual experience almost like a sport; a skill you can sharpen. Would make the roads a lot safer and stress free.