Hanoi is a beautiful city, imagine motocycles on the road coming in all directions and there are no traffic lights to control the traffic. Yet, motorists and pedestrains still manage to manoveur their way through traffic. Also, even though language barrier may be a problem to some.. the locals here are still friendly and will flash you a wide smile.
That's amazing and welcome to Vietnam.
In Hanoi, there are several sites that you can visit such as the temples and pagodas. But if you are looking for something more... you need to get out of the city. You might want to check with the hotel that you are staying in if they are able to help you with day tour arrangements. Day tours are fairly cheap so its worth it, considering they will pick you up or drop you off at your hotel.