I am about your size. I commute every day and have hills. You don't need a 17lb road bike (unless you want one just because). I have 20ish lb touring bikes for my commuter bikes. They have mountain bike gearing for the hills. A hybrid bike might work out well for you. It's not always easy to find extra small size bikes, but they are out there.

Have you looked at any bikes in particular yet?

My herd of bikes is mostly odd-ball brands so I am not up to speed on what the latest available bikes are at bike shops, but other folks here might be able to offer suggestions.