When introducing yourself in a work place, start by offering a handshake - it's a formal setting, handshakes are preferred over "Hi" and "Hello".
Make eye contacts, this will help the person know you are carried along and engaged in the interaction.
Look confident, this is the appropriate body language expected in a work place. It should be used in this setting. Keep a genuine smile all through the introduction.
Hope this helps.
It is normal for you to feel nervous when you are going to have a new job. There is a big possibility that you will feel a bit awkward. As long as you know how to present yourself, it will not be too hard to do. You may want to shake hands with the people that you will meet.
Always look at them in the eye and try to remember their faces and names. The faster that you remember, the easier it will be for you to address them by name if needed. When you remember people immediately, you can make a good first impression with them. This will make fitting in with the rest of the organization easier for anyone.