talking skills

I'am a deadly shy person and can't say a word without being paranoid that one of my family can hear me talking to myself basically or that I'am going to mess up completely :( anybody have any tips to overcome shyness? or even just what to say? sorry for annoyance XD Thanks :)

I have done voice overs in high-school for the news,also have done improve acting and theatre. I am good with impersonations so if your looking I'm your guy.