Do whatever you want and do not be scared what others think. Live your life the way you want and don't let others ruin it. If you want to dance, then dance. If you want to smoke, smoke. If you want to sing loudly, just do it! Breathe and let your soul be happy, because one day you will wake up and realise you are 48 years old and you didn't live the way you wanted. You won't regret the things you have done, you will regret the things you have never ended up doing.
Everything is in your hands. Appreciate it and make the best of it. Good luck.