I would also suggest a simple isometric exercise to strengthen the front of the neck which typically gets weak with poor posture, especially if you tend to have forward head posture.
Sit tall, shoulders down and back, chest open, now relax in the posture. Tuck your chin as if you've just smelled something strong, (or you can think turtle). Place the heel of your hand against your forhead and push against your hand with your head, breathe deeply for 5 deep breaths and relax. Repeat 3-5 times. Do this a few times a day, this simple exercise helps tremedously and will eventually make it easier for your neck to hold your head above the shoulders instead of it poking forward. Good that you are aware of the need to work on your posture, the older we get the more posture matters. HTH
Take Care
Laurie