I'm nervous

I've been cleaning carpet for 14 years and in business 8 months...I cleaned for this property owner two days ago and he's the president of a property association and he wants me to give speech may 1st on the rotovac. He can't believe the tremendous job I did and how I took my time compared to previous companys he used before and he never saw this machine before..I'm nervous suppost to give a 20min speech about the machine and my company. Any suggestions. ..

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I'm nervous