(Since the question included “you” I’m assuming “I” can be used in the paragraph. If not just change that part.”
I believe a positive way you can impact your community is helping out your older neighbors. Say that your neighbor needs help mowing the lawn, or bagging leaves. Help them out, it can make them feel loved and appreciated. By doing this, you are making someone in your community happy. And by making one person happy, that person can pass on their positive vibes to someone else, resulting in a happy and healthy community. Another positive way to impact your community is to recycle. There are many, many ways you can recycle. One of many is recycling can and plastic bottles. And one more, by not smoking. When you smoke, you are putting so much pollution into the environment, and your damaging your lungs. These are just a few of the ways you can change your community for the better.
Hope this helps!