Congratulations. I'd like to thank you for your service and for following our immigration laws. Please feel free to fully excercise your civil rights (all of them), you've earned it.
Don't be shy, step up and gitcha self some. Speak up when you see something you don't like. You are now fully an American in good standing and your views are as valid and worth hearing as any natural-born citizen, so feel free to get involved. In whatever you like. I believe I can tell you, without fear of contradiction, that everyone here will fully support your civil rights to the utmost. How could they not, you've served for ours.
Again, congrats, thank you, and welcome to the tribe.