Head to the Manchester traffic circle (you'll pass the Goldenrod restaurant first, then there'll be a hunting supply store, a convenience store, and some road signs, one leading to the town of Chester, NH) Go around the traffic circle, aiming to pass the convenience store on your right hand side. Stay on that road--you'll be headed towards Chester, although, technically, you'll be going through Auburn, first. Don't let that throw you.

Now, on the right hand side of the road, will be Lake Massabeesic. You will see various pull offs and parking areas. A good many of them are good spots to pull over and see the views of foliage, sailboats, wildlife, etc. Depending on the season, it's a good way to get to shooting the breeze with local fishermen, or, photographers, or what-have-you. I highly recommend bringing a camera.

Should you choose to keep going, you'll eventually wind up at the blinker in Chester Center at the intersection of Route 102 and Route 121.

If you turn right, you'll be headed towards Derry, NH. If you turn left, you'll be headed towards Raymond, NH. If you go straight ahead, you'll eventually wind up in Sandown, NH. I do recommend exploring these back (ish) roads when you aren't in any particular hurry.

I realize that I may have thoroughly confused you. Here's how you fix that: Go to the bookstore, and ask for a copy of the New Hampshire Gazetteer. It's a paper map book of the towns/cities in NH, and this will be a huge help to you when GPS is being less than helpful and you're trying to either make sense of directions given by someone who has been driving the NH back roads since they got a license, or, when GPS is being less than helpful and you're trying to get off of some godforsaken back road somewhere.

Hope this helps! Good luck!