Our best work as actors demands, DEMANDS that you are able to put your attention and focus 100% where it belongs – on your scene partner, what you are doing and what you are hearing and seeing. Nerves cause actors to be self-focused. So get into training and keep training yourself to get your attention off yourself.
Last week I saw a trailer that some actors made for an upcoming production that was in a word EMBARRASSING. Here’s why. They were so sure that they were funny; they were so obviously playing to impress us, to humor us, to sort of say, “look what amazing character work I am doing,” that it was awful. These folks would not get hired but unfortunately their teacher/director is back in the mid-20th century and thinks that is acting.