Your manager will probably assign a project to you that you can "own." Often, this will be developing a new feature. You will have a lot of support, so don't feel afraid to ask for help.
You will be part of the team, but also you will be focused on your project more than the team's overarching projects. You will become familiar with the process of collaborating, developing, and documenting development in a corporate setting.
NICE inContact also has a lot of great activities that they put on routinely--movie outings, barbeques, chess tournaments, etc. Definitely take advantage of these; they're a lot of fun!