Tell the dealer and the other players that you have never played live before and ask them to please be patient. (If you do this I guarantee they will be)
Ask if your unsure about anything, and always announce your intentions before you put chips into the pot. i.e. "I Call" Or, "I raise 150", etc.
Don't wear shades or headphones.
Smile.
thanks ........ sounds safe,good advice. i just hope i dont mess up