hard work

I get engaged a full time job since a month ago. This is the first time to get a full time job for me.
For most people it is not so hard, but for me it's very hard.
One of the reason is the kinds of the work. I have to keep smiling, loud voice and check our customers' feelings. Like "are they looking for something?" or "is he the man who wants to meet our boss?" and so on. I am not good at communicating with people. So when I'm on working, always feeling nerves.
But giving something (all kinds of services) to peple is very interesting task, so I like this work. Although it is very difficult to communicate with many peple, it is very exciting at the same time. I enjoy my work now.