Induction training
In some cases, your first day may involve attending an organizational induction course, instead of meeting your manager or team. If this happens, then simply remember that you are meeting and going through the same process as other new starters and meeting members of the HR recruitment team.
You may well be working with the people you meet after the induction. So, take the opportunity to identify potential key stakeholders, as well as building your understanding of the organization by learning about the jobs of other new starters.
For example, if you know from your interview that you are going to be working on a project to implement a new accounting system, then seeking out and building a relationship with a new starter from the accounting department would be sensible. They may have good information on the current structure and affairs of the department, and so building a relationship with them could be very useful going forward, especially if they also join the project as a business representative.