Sweet cameramen

I hate video interviews. Contrary to popular opinion I am very much of a shy person; the only way I manage to mask my shyness is with some sort of foolish sub-witty comments. But if I'm trying to be entirely and completely sincere and happy and godly, I can get very nervous, very fidgety, and very humiliated. I can do that thing where someone aims a camera in my face and I go "Yo wassap" and answer their questions very cleverly without actually answering their questions (and maybe doing a little dance for distraction). But when I get sincere, my face becomes this clean canvas of inner turmoil. Even when I've committed the whole thing to the Lord and said, "Lord, humble me, use me as You will," and I'm not even trying to be cool...I look like I'm desperately wringing my heart out. How does one look just blissfully happy in Jesus? Does it come with practice? How can I not look so pathetic please?