I've been job hunting for the past 6 months, today my friend gave me a number to a company who's hiring and I'm too scared to call.

I've been job hunting for the past 6 months, today my friend gave me a number to a company who's hiring and I'm too scared to call. I feel like such a coward. I know that I'm going to stutter and have really bad blocks. But shit, I've been unemployed for a while a need a job. I usually perfer to submit applications but I don't even know where this place is located at. Can anybody offer me some advice please? What should I say? How can I keep myself calm?