Mate, you do, photography is about confidence, and having the confidence to get out and get the shot you want, my firework photography is something I'm working on, I'm not perfect it at it..
Always remember, photography is Trial and Error, if you dont get what you achieve in one shot, analyse, change the settings and try again.
Everyone has the capability to take brilliant shots.. Just work on it, keep practising and just get out more, dont let the dark or the cold put you off, wrap up, take your cam and just do it.